1
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Brotons-Alcázar I, Terreblanche JS, Giménez-Santamarina S, Gutiérrez-Finol GM, Ryder KS, Forment-Aliaga A, Coronado E. Atomic Force Microscopy beyond Topography: Chemical Sensing of 2D Material Surfaces through Adhesion Measurements. ACS Appl Mater Interfaces 2024; 16:19711-19719. [PMID: 38567570 DOI: 10.1021/acsami.3c19254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Developing new functionalities of two-dimensional materials (2Dms) can be achieved by their chemical modification with a broad spectrum of molecules. This functionalization is commonly studied by using spectroscopies such as Raman, IR, or XPS, but the detection limit is a common problem. In addition, these methods lack detailed spatial resolution and cannot provide information about the homogeneity of the coating. Atomic force microscopy (AFM), on the other hand, allows the study of 2Dms on the nanoscale with excellent lateral resolution. AFM has been extensively used for topographic analysis; however, it is also a powerful tool for evaluating other properties far beyond topography such as mechanical ones. Therefore, herein, we show how AFM adhesion mapping of transition metal chalcogenide 2Dms (i.e., MnPS3 and MoS2) permits a close inspection of the surface chemical properties. Moreover, the analysis of adhesion as relative values allows a simple and robust strategy to distinguish between bare and functionalized layers and significantly improves the reproducibility between measurements. Remarkably, it is also confirmed by statistical analysis that adhesion values do not depend on the thickness of the layers, proving that they are related only to the most superficial part of the materials. In addition, we have implemented an unsupervised classification method using k-means clustering, an artificial intelligence-based algorithm, to automatically classify samples based on adhesion values. These results demonstrate the potential of simple adhesion AFM measurements to inspect the chemical nature of 2Dms and may have implications for the broad scientific community working in the field.
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Affiliation(s)
- Isaac Brotons-Alcázar
- Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain
| | - Jason S Terreblanche
- Center for Sustainable Materials Processing, School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, U.K
| | - Silvia Giménez-Santamarina
- Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain
| | - Gerliz M Gutiérrez-Finol
- Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain
| | - Karl S Ryder
- Center for Sustainable Materials Processing, School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, U.K
| | - Alicia Forment-Aliaga
- Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain
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2
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Jo J, Mañas-Valero S, Coronado E, Casanova F, Gobbi M, Hueso LE. Nonvolatile Electric Control of Antiferromagnet CrSBr. Nano Lett 2024; 24:4471-4477. [PMID: 38587318 DOI: 10.1021/acs.nanolett.4c00348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
van der Waals magnets are emerging as a promising material platform for electric field control of magnetism, offering a pathway toward the elimination of external magnetic fields from spintronic devices. A further step is the integration of such magnets with electrical gating components that would enable nonvolatile control of magnetic states. However, this approach remains unexplored for antiferromagnets, despite their growing significance in spintronics. Here, we demonstrate nonvolatile electric field control of magnetoelectric characteristics in van der Waals antiferromagnet CrSBr. We integrate a CrSBr channel in a flash-memory architecture featuring charge trapping graphene multilayers. The electrical gate operation triggers a nonvolatile 200% change in the antiferromagnetic state of CrSBr resistance by manipulating electron accumulation/depletion. Moreover, the nonvolatile gate modulates the metamagnetic transition field of CrSBr and the magnitude of magnetoresistance. Our findings highlight the potential of manipulating magnetic properties of antiferromagnetic semiconductors in a nonvolatile way.
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Affiliation(s)
- Junhyeon Jo
- CIC nanoGUNE BRTA, 20018 Donostia-San Sebastian, Basque Country, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol) Universitat de València, Catedrático José Beltrán 2, Paterna 46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universitat de València, Catedrático José Beltrán 2, Paterna 46980, Spain
| | - Fèlix Casanova
- CIC nanoGUNE BRTA, 20018 Donostia-San Sebastian, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Basque Country, Spain
| | - Marco Gobbi
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Basque Country, Spain
- Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU, 20018 Donostia-San Sebastián, Basque Country, Spain
| | - Luis E Hueso
- CIC nanoGUNE BRTA, 20018 Donostia-San Sebastian, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Basque Country, Spain
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3
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Boix-Constant C, Jenkins S, Rama-Eiroa R, Santos EJG, Mañas-Valero S, Coronado E. Multistep magnetization switching in orthogonally twisted ferromagnetic monolayers. Nat Mater 2024; 23:212-218. [PMID: 38036623 PMCID: PMC10837074 DOI: 10.1038/s41563-023-01735-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 10/13/2023] [Indexed: 12/02/2023]
Abstract
The advent of twist engineering in two-dimensional crystals enables the design of van der Waals heterostructures with emergent properties. In the case of magnets, this approach can afford artificial antiferromagnets with tailored spin arrangements. Here we fabricate an orthogonally twisted bilayer by twisting two CrSBr ferromagnetic monolayers with an easy-axis in-plane spin anisotropy by 90°. The magnetotransport properties reveal multistep magnetization switching with a magnetic hysteresis opening, which is absent in the pristine case. By tuning the magnetic field, we modulate the remanent state and coercivity and select between hysteretic and non-hysteretic magnetoresistance scenarios. This complexity pinpoints spin anisotropy as a key aspect in twisted magnetic superlattices. Our results highlight control over the magnetic properties in van der Waals heterostructures, leading to a variety of field-induced phenomena and opening a fruitful playground for creating desired magnetic symmetries and manipulating non-collinear magnetic configurations.
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Affiliation(s)
- Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol) - Universitat de València, Paterna, Spain
| | - Sarah Jenkins
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - Ricardo Rama-Eiroa
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
- Donostia International Physics Center (DIPC), Donostia-San Sebastián, Spain
| | - Elton J G Santos
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK.
- Donostia International Physics Center (DIPC), Donostia-San Sebastián, Spain.
- Higgs Centre for Theoretical Physics, The University of Edinburgh, Edinburgh, UK.
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol) - Universitat de València, Paterna, Spain.
- Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) - Universitat de València, Paterna, Spain.
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4
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Lu Y, Hu Z, Petkov P, Fu S, Qi H, Huang C, Liu Y, Huang X, Wang M, Zhang P, Kaiser U, Bonn M, Wang HI, Samorì P, Coronado E, Dong R, Feng X. Tunable Charge Transport and Spin Dynamics in Two-Dimensional Conjugated Metal-Organic Frameworks. J Am Chem Soc 2024; 146:2574-2582. [PMID: 38231138 DOI: 10.1021/jacs.3c11172] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Two-dimensional conjugated metal-organic frameworks (2D c-MOFs) have attracted increasing interest in electronics due to their (semi)conducting properties. Charge-neutral 2D c-MOFs also possess persistent organic radicals that can be viewed as spin-concentrated arrays, affording new opportunities for spintronics. However, the strong π-interaction between neighboring layers of layer-stacked 2D c-MOFs annihilates active spin centers and significantly accelerates spin relaxation, severely limiting their potential as spin qubits. Herein, we report the precise tuning of the charge transport and spin dynamics in 2D c-MOFs via the control of interlayer stacking. The introduction of bulky side groups on the conjugated ligands enables a significant dislocation of the 2D c-MOFs layers from serrated stacking to staggered stacking, thereby spatially weakening the interlayer interactions. As a consequence, the electrical conductivity of 2D c-MOFs decreases by 6 orders of magnitude, while the spin density achieves more than a 30-fold increase and the spin-lattice relaxation time (T1) is increased up to ∼60 μs, hence being superior to the reference 2D c-MOFs with compact stackings whose spin relaxation is too fast to be detected. Spin dynamics results also reveal that spinless polaron pairs or bipolarons play critical roles in the charge transport of these 2D c-MOFs. Our strategy provides a bottom-up approach for enlarging spin dynamics in 2D c-MOFs, opening up pathways for developing MOF-based spintronics.
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Affiliation(s)
- Yang Lu
- Max Planck Institute of Microstructure Physics, 06120 Halle (Saale), Germany
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
- Université de Strasbourg, CNRS, ISIS, UMR 7006, 8 Alleé Gaspard Monge, 67000 Strasbourg, France
| | - Ziqi Hu
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980 Paterna, Spain
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, 230026 Hefei, China
| | - Petko Petkov
- Faculty of Chemistry and Pharmacy, University of Sofia, 1164 Sofia, Bulgaria
| | - Shuai Fu
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Haoyuan Qi
- Central Facility for Electron Microscopy, Electron Microscopy of Materials Science, Universität Ulm, 89081 Ulm, Germany
| | - Chuanhui Huang
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
| | - Yannan Liu
- Max Planck Institute of Microstructure Physics, 06120 Halle (Saale), Germany
| | - Xing Huang
- Max Planck Institute of Microstructure Physics, 06120 Halle (Saale), Germany
| | - Mingchao Wang
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
| | - Peng Zhang
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
| | - Ute Kaiser
- Central Facility for Electron Microscopy, Electron Microscopy of Materials Science, Universität Ulm, 89081 Ulm, Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Hai I Wang
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
- Nanophotonics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Paolo Samorì
- Université de Strasbourg, CNRS, ISIS, UMR 7006, 8 Alleé Gaspard Monge, 67000 Strasbourg, France
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980 Paterna, Spain
| | - Renhao Dong
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, China
| | - Xinliang Feng
- Max Planck Institute of Microstructure Physics, 06120 Halle (Saale), Germany
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01067 Dresden, Germany
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5
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Torres-Cavanillas R, Gavara-Edo M, Coronado E. Bistable Spin-Crossover Nanoparticles for Molecular Electronics. Adv Mater 2024; 36:e2307718. [PMID: 37725707 DOI: 10.1002/adma.202307718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/25/2023] [Indexed: 09/21/2023]
Abstract
The field of spin-crossover complexes is rapidly evolving from the study of the spin transition phenomenon to its exploitation in molecular electronics. Such spin transition is gradual in a single-molecule, while in bulk it can be abrupt, showing sometimes thermal hysteresis and thus a memory effect. A convenient way to keep this bistability while reducing the size of the spin-crossover material is to process it as nanoparticles (NPs). Here, the most recent advances in the chemical design of these NPs and their integration into electronic devices, paying particular attention to optimizing the switching ratio are reviewed. Then, integrating spin-crossover NPs over 2D materials is focused to improve the endurance, performance, and detection of the spin state in these hybrid devices.
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Affiliation(s)
- Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
- Department of Materials, Oxford University, Oxford, OX2 6NN, UK
| | - Miguel Gavara-Edo
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
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6
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Houmes MJA, Baglioni G, Šiškins M, Lee M, Esteras DL, Ruiz AM, Mañas-Valero S, Boix-Constant C, Baldoví JJ, Coronado E, Blanter YM, Steeneken PG, van der Zant HSJ. Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction. Nat Commun 2023; 14:8503. [PMID: 38129381 PMCID: PMC10739885 DOI: 10.1038/s41467-023-44180-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023] Open
Abstract
The temperature dependent order parameter provides important information on the nature of magnetism. Using traditional methods to study this parameter in two-dimensional (2D) magnets remains difficult, however, particularly for insulating antiferromagnetic (AF) compounds. Here, we show that its temperature dependence in AF MPS3 (M(II) = Fe, Co, Ni) can be probed via the anisotropy in the resonance frequency of rectangular membranes, mediated by a combination of anisotropic magnetostriction and spontaneous staggered magnetization. Density functional calculations followed by a derived orbital-resolved magnetic exchange analysis confirm and unravel the microscopic origin of this magnetization-induced anisotropic strain. We further show that the temperature and thickness dependent order parameter allows to deduce the material's critical exponents characterising magnetic order. Nanomechanical sensing of magnetic order thus provides a future platform to investigate 2D magnetism down to the single-layer limit.
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Affiliation(s)
- Maurits J A Houmes
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands.
| | - Gabriele Baglioni
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Makars Šiškins
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Martin Lee
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Dorye L Esteras
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Alberto M Ruiz
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Samuel Mañas-Valero
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Jose J Baldoví
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Yaroslav M Blanter
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Peter G Steeneken
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
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7
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Gavara-Edo M, Valverde-Muñoz FJ, Muñoz MC, Elidrissi Moubtassim S, Marques-Moros F, Herrero-Martín J, Znovjyak K, Seredyuk M, Real JA, Coronado E. Design and Processing as Ultrathin Films of a Sublimable Iron(II) Spin Crossover Material Exhibiting Efficient and Fast Light-Induced Spin Transition. Chem Mater 2023; 35:9591-9602. [PMID: 38047182 PMCID: PMC10687866 DOI: 10.1021/acs.chemmater.3c01704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 12/05/2023]
Abstract
Materials based on spin crossover (SCO) molecules have centered the attention in molecular magnetism for more than 40 years as they provide unique examples of multifunctional and stimuli-responsive materials, which can be then integrated into electronic devices to exploit their molecular bistability. This process often requires the preparation of thermally stable SCO molecules that can sublime and remain intact in contact with surfaces. However, the number of robust sublimable SCO molecules is still very scarce. Here, we report a novel example of this kind. It is based on a neutral iron(II) coordination complex formulated as [Fe(neoim)2], where neoimH is the ionogenic ligand 2-(1H-imidazol-2-yl)-9-methyl-1,10-phenanthroline. In the first part, a comprehensive study, which covers the synthesis and magnetostructural characterization of the [Fe(neoim)2] complex as a bulk microcrystalline material, is reported. Then, in the second part, we investigate the suitability of this material to form thin films through high-vacuum sublimation. Finally, the retainment of all present SCO capabilities in the bulk when the material is processed is thoroughly studied by means of X-ray absorption spectroscopy. In particular, a very efficient and fast light-induced spin transition (LIESST effect) has been observed, even for ultrathin films of 15 nm.
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Affiliation(s)
- Miguel Gavara-Edo
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
| | | | - M. Carmen Muñoz
- Departamento
de Fisica Aplicada, Universitat Politècnica
de València, Camino de Vera s/n, Valencia 46022, Spain
| | - Safaa Elidrissi Moubtassim
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
| | - Francisco Marques-Moros
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
| | | | - Kateryna Znovjyak
- Department
of Chemistry, Taras Shevchenko National
University of Kyiv, 64/13,
Volodymyrska Street, Kyiv 01601, Ukraine
| | - Maksym Seredyuk
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
- Department
of Chemistry, Taras Shevchenko National
University of Kyiv, 64/13,
Volodymyrska Street, Kyiv 01601, Ukraine
| | - José Antonio Real
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, Paterna 46980, Spain
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8
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Jo J, Peisen Y, Yang H, Mañas-Valero S, Baldoví JJ, Lu Y, Coronado E, Casanova F, Bergeret FS, Gobbi M, Hueso LE. Local control of superconductivity in a NbSe 2/CrSBr van der Waals heterostructure. Nat Commun 2023; 14:7253. [PMID: 37945570 PMCID: PMC10636142 DOI: 10.1038/s41467-023-43111-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 10/31/2023] [Indexed: 11/12/2023] Open
Abstract
Two-dimensional magnets and superconductors are emerging as tunable building-blocks for quantum computing and superconducting spintronic devices, and have been used to fabricate all two-dimensional versions of traditional devices, such as Josephson junctions. However, novel devices enabled by unique features of two-dimensional materials have not yet been demonstrated. Here, we present NbSe2/CrSBr van der Waals superconducting spin valves that exhibit infinite magnetoresistance and nonreciprocal charge transport. These responses arise from a unique metamagnetic transition in CrSBr, which controls the presence of localized stray fields suitably oriented to suppress the NbSe2 superconductivity in nanoscale regions and to break time reversal symmetry. Moreover, by integrating different CrSBr crystals in a lateral heterostructure, we demonstrate a superconductive spin valve characterized by multiple stable resistance states. Our results show how the unique physical properties of layered materials enable the realization of high-performance quantum devices based on novel working principles.
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Affiliation(s)
- Junhyeon Jo
- CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain.
| | - Yuan Peisen
- CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain
| | - Haozhe Yang
- CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Paterna, Spain
| | - José J Baldoví
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Paterna, Spain
| | - Yao Lu
- Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU, Donostia-San Sebastian, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Paterna, Spain
| | - Fèlix Casanova
- CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - F Sebastian Bergeret
- Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU, Donostia-San Sebastian, Spain
- Donostia International Physics Center (DIPC), E-20018, Donostia-San Sebastián, Spain
| | - Marco Gobbi
- Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU, Donostia-San Sebastian, Spain.
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain.
| | - Luis E Hueso
- CIC nanoGUNE BRTA, Donostia-San Sebastian, Spain.
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain.
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9
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Zur Y, Noah A, Boix-Constant C, Mañas-Valero S, Fridman N, Rama-Eiroa R, Huber ME, Santos EJG, Coronado E, Anahory Y. Magnetic Imaging and Domain Nucleation in CrSBr Down to the 2D Limit. Adv Mater 2023; 35:e2307195. [PMID: 37702506 DOI: 10.1002/adma.202307195] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/31/2023] [Indexed: 09/14/2023]
Abstract
Recent advancements in 2D materials have revealed the potential of van der Waals magnets, and specifically of their magnetic anisotropy that allows applications down to the 2D limit. Among these materials, CrSBr has emerged as a promising candidate, because its intriguing magnetic and electronic properties have appeal for both fundamental and applied research in spintronics or magnonics. In this work, nano-SQUID-on-tip (SOT) microscopy is used to obtain direct magnetic imaging of CrSBr flakes with thicknesses ranging from monolayer (N = 1) to few-layer (N = 5). The ferromagnetic order is preserved down to the monolayer, while the antiferromagnetic coupling of the layers starts from the bilayer case. For odd layers, at zero applied magnetic field, the stray field resulting from the uncompensated layer is directly imaged. The progressive spin reorientation along the out-of-plane direction (hard axis) is also measured with a finite applied magnetic field, allowing evaluation of the anisotropy constant, which remains stable down to the monolayer and is close to the bulk value. Finally, by selecting the applied magnetic field protocol, the formation of Néel magnetic domain walls is observed down to the single-layer limit.
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Affiliation(s)
- Yishay Zur
- The Racah Institute of Physics, The Hebrew University, Jerusalem, 9190401, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Avia Noah
- The Racah Institute of Physics, The Hebrew University, Jerusalem, 9190401, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Nofar Fridman
- The Racah Institute of Physics, The Hebrew University, Jerusalem, 9190401, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Ricardo Rama-Eiroa
- Donostia International Physics Center (DIPC), Basque Country, Donostia-San Sebastián, 20018, Spain
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH93FD, UK
| | - Martin E Huber
- Departments of Physics and Electrical Engineering, University of Colorado Denver, Denver, CO, 80217, USA
| | - Elton J G Santos
- Donostia International Physics Center (DIPC), Basque Country, Donostia-San Sebastián, 20018, Spain
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH93FD, UK
- Higgs Centre for Theoretical Physics, University of Edinburgh, Edinburgh, EH93FD, UK
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Yonathan Anahory
- The Racah Institute of Physics, The Hebrew University, Jerusalem, 9190401, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel
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10
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Núñez-López A, Torres-Cavanillas R, Morant-Giner M, Vassilyeva N, Mattana R, Tatay S, Ohresser P, Otero E, Fonda E, Paulus M, Rubio-Giménez V, Forment-Aliaga A, Coronado E. Hybrid Heterostructures of a Spin Crossover Coordination Polymer on MoS 2 : Elucidating the Role of the 2D Substrate. Small 2023:e2304954. [PMID: 37594729 DOI: 10.1002/smll.202304954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/20/2023] [Indexed: 08/19/2023]
Abstract
Controlling the deposition of spin-crossover (SCO) materials constitutes a crucial step for the integration of these bistable molecular systems in electronic devices. Moreover, the influence of functional surfaces, such as 2D materials, can be determinant on the properties of the deposited SCO film. In this work, ultrathin films of the SCO Hofmann-type coordination polymer [Fe(py)2 {Pt(CN)4 }] (py = pyridine) onto monolayers of 1T and 2H MoS2 polytypes are grown. The resulting hybrid heterostructures are characterized by GIXRD, XAS, XPS, and EXAFS to get information on the structure and the specific interactions generated at the interface, as well as on the spin transition. The use of a layer-by-layer results in SCO/2D heterostructures, with crystalline and well-oriented [Fe(py)2 {Pt(CN)4 }]. Unlike with conventional Au or SiO2 substrates, no intermediate self-assembled monolayer is required, thanks to the surface S atoms. Furthermore, it is observed that the higher presence of Fe3+ in the 2H heterostructures hinders an effective spin transition for [Fe(py)2 {Pt(CN)4 }] films thinner than 8 nm. Remarkably, when using 1T MoS2 , this transition is preserved in films as thin as 4 nm, due to the reducing character of this metallic substrate. These results highlight the active role that 2D materials play as substrates in hybrid molecular/2D heterostructures.
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Affiliation(s)
- Alejandro Núñez-López
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
- Department of Materials, University of Oxford, OX1 3PH, Oxford, UK
| | - Marc Morant-Giner
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, 34127, Via L. Giorgieri 1, Trieste, Italy
| | - Natalia Vassilyeva
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
| | - Richard Mattana
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Sergio Tatay
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers, 91190, Saint Aubin, France
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers, 91190, Saint Aubin, France
| | - Emiliano Fonda
- Synchrotron SOLEIL, L'Orme des Merisiers, 91190, Saint Aubin, France
| | - Michael Paulus
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221, Dortmund, Germany
| | - Víctor Rubio-Giménez
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), Katholieke Universiteit Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Alicia Forment-Aliaga
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980, Catedrático José Beltrán 2, Paterna, Spain
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11
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Baglioni G, Šiškins M, Houmes M, Lee M, Shin DH, Mañas-Valero S, Coronado E, Blanter YM, van der Zant HSJ, Steeneken PG. Thermo-Magnetostrictive Effect for Driving Antiferromagnetic Two-Dimensional Material Resonators. Nano Lett 2023; 23:6973-6978. [PMID: 37466285 PMCID: PMC10416344 DOI: 10.1021/acs.nanolett.3c01610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/14/2023] [Indexed: 07/20/2023]
Abstract
Magnetostrictive coupling has recently attracted interest as a sensitive method for studying magnetism in two-dimensional (2D) materials by mechanical means. However, its application in high-frequency magnetic actuators and transducers requires rapid modulation of the magnetic order, which is difficult to achieve with external magnets, especially when dealing with antiferromagnets. Here, we optothermally modulate the magnetization in antiferromagnetic 2D material membranes of metal phosphor trisulfides (MPS3), to induce a large high-frequency magnetostrictive driving force. From the analysis of the temperature-dependent resonance amplitude, we provide evidence that the force is due to a thermo-magnetostrictive effect, which significantly increases near the Neél temperature, due to the strong temperature dependence of the magnetization. By studying its angle dependence, we find the effect is observed to follow anisotropic magnetostriction of the crystal lattice. The results show that the thermo-magnetostrictive effect results in a strongly enhanced thermal expansion force near the critical temperature of magnetostrictive 2D materials, which can enable more efficient actuation of nano-magnetomechanical devices and can also provide a route for studying the high-frequency coupling among magnetic, mechanical, and thermodynamic degrees of freedom down to the 2D limit.
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Affiliation(s)
- Gabriele Baglioni
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Makars Šiškins
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Maurits Houmes
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Martin Lee
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Dong Hoon Shin
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Samuel Mañas-Valero
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
- Instituto
de Ciencia Molecular (ICMol), Universitat
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Yaroslav M. Blanter
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Herre S. J. van der Zant
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
| | - Peter G. Steeneken
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg
1, 2628 CJ Delft, The Netherlands
- Department
of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
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12
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Marques-Moros F, Boix-Constant C, Mañas-Valero S, Canet-Ferrer J, Coronado E. Interplay between Optical Emission and Magnetism in the van der Waals Magnetic Semiconductor CrSBr in the Two-Dimensional Limit. ACS Nano 2023; 17:13224-13231. [PMID: 37442121 PMCID: PMC10863932 DOI: 10.1021/acsnano.3c00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 07/06/2023] [Indexed: 07/15/2023]
Abstract
The van der Waals semiconductor metamagnet CrSBr offers an ideal platform for studying the interplay between optical and magnetic properties in the two-dimensional limit. Here, we carried out an exhaustive optical characterization of this material by means of temperature- and magnetic-field-dependent photoluminescence (PL) on flakes of different thicknesses down to the monolayer. We found a characteristic emission peak that is quenched upon switching the ferromagnetic layers from an antiparallel to a parallel configuration and exhibits a temperature dependence different from that of the peaks commonly ascribed to excitons. The contribution of this peak to the PL is boosted around 30-40 K, coinciding with the hidden order magnetic transition temperature. Our findings reveal the connection between the optical and magnetic properties via the ionization of magnetic donor vacancies. This behavior enables a useful tool for the optical reading of the magnetic states in atomically thin layers of CrSBr and shows the potential of the design of 2D heterostructures with magnetic and excitonic properties.
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Affiliation(s)
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular
(ICMol), Universitat de València, 46980, Paterna, Spain
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13
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Gómez-Muñoz I, Dey C, Coronado E. Effect of Nonconstituent Additive Ions on the Controlled Crystallization of Lanthanide-Based Preyssler Polyoxometalates. Cryst Growth Des 2023; 23:3544-3548. [PMID: 37159652 PMCID: PMC10161220 DOI: 10.1021/acs.cgd.3c00046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/23/2023] [Indexed: 05/11/2023]
Abstract
Preyssler-type polyoxometalates (POMs) encapsulating lanthanide ions have been shown to provide ideal examples of single-molecule magnets and spin-qubits. However, the advances in this area are limited by the quality and size of the crystals. In this work, the role of additives ions in the crystallization of these POMs from aqueous solutions has been investigated. More specifically, we have studied the influence of Al3+, Y3+, and In3+ on the crystallization process of K12[MP5W30O110] (where M = Gd and Y). The results show that the concentration of these ions in the solution plays an important role in controlling the crystallization rate of the grown POM crystals leading to a significant increase in their size, while showing very little or no tendency to be incorporated into the structure. This has allowed us to obtain pure Gd or Y crystals, as well as diluted magnetic crystals formed by the diamagnetic Y3+ POM doped with the magnetic Gd3+ ion.
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14
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Burzurí E, Martínez-Pérez MJ, Martí-Gastaldo C, Evangelisti M, Mañas-Valero S, Coronado E, Martínez JI, Galan-Mascaros JR, Luis F. A quantum spin liquid candidate isolated in a two-dimensional Co IIRh III bimetallic oxalate network. Chem Sci 2023; 14:3899-3906. [PMID: 37035710 PMCID: PMC10074444 DOI: 10.1039/d2sc06407c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/05/2023] [Indexed: 04/11/2023] Open
Abstract
A quantum spin liquid (QSL) is an elusive state of matter characterized by the absence of long-range magnetic order, even at zero temperature, and by the presence of exotic quasiparticle excitations. In spite of their relevance for quantum communication, topological quantum computation and the understanding of strongly correlated systems, like high-temperature superconductors, the unequivocal experimental identification of materials behaving as QSLs remains challenging. Here, we present a novel 2D heterometallic oxalate complex formed by high-spin Co(ii) ions alternating with diamagnetic Rh(iii) in a honeycomb lattice. This complex meets the key requirements to become a QSL: a spin ½ ground state for Co(ii), determined by spin-orbit coupling and crystal field, a magnetically-frustrated triangular lattice due to the presence of antiferromagnetic correlations, strongly suppressed direct exchange interactions and the presence of equivalent interfering superexchange paths between Co centres. A combination of electronic paramagnetic resonance, specific heat and ac magnetic susceptibility measurements in a wide range of frequencies and temperatures shows the presence of strong antiferromagnetic correlations concomitant with no signs of magnetic ordering down to 15 mK. These results show that bimetallic oxalates are appealing QSL candidates as well as versatile systems to chemically fine tune key aspects of a QSL, like magnetic frustration and superexchange path geometries.
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Affiliation(s)
- Enrique Burzurí
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid E-28049 Madrid Spain
- Condensed Matter Physics Center (IFIMAC) and Instituto Universitario de Ciencia de Materiales "Nicolás Cabrera" (INC), Universidad Autónoma de Madrid E-28049 Madrid Spain
- IMDEA Nanociencia C\Faraday 9, Ciudad Universitaria de Cantoblanco Madrid Spain
| | - María José Martínez-Pérez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
| | - Carlos Martí-Gastaldo
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Calle Catedrático José Beltrán 2 Paterna 46980 Spain
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Calle Catedrático José Beltrán 2 Paterna 46980 Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Calle Catedrático José Beltrán 2 Paterna 46980 Spain
| | - Jesús I Martínez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
| | - Jose Ramon Galan-Mascaros
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST) Av. Paisos Catalans 16 Tarragona 43007 Spain
- ICREA Passeig Lluís Companys 23 Barcelona 08010 Spain
| | - Fernando Luis
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
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15
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García-López V, El Jastimi HEM, Juráková J, Clemente-León M, Coronado E. Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior. Cryst Growth Des 2023; 23:2730-2738. [PMID: 37038402 PMCID: PMC10080648 DOI: 10.1021/acs.cgd.2c01524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/21/2023] [Indexed: 06/19/2023]
Abstract
Three solvatomorphs of the iron(II) complex of 2,6-di[4-(ethylcarboxy)pyrazol-1-yl]pyridine (bpCOOEt2p) of formulas [Fe(bpCOOEt2p)2](ClO4)2·1.5MeNO2 (1), [Fe(bpCOOEt2p)2](ClO4)2·MeNO2 (2), and [Fe(bpCOOEt2p)2](ClO4)2·2MeNO2 (3) have been prepared and characterized. They show interesting spin-crossover (SCO) properties ranging from partial to complete thermal spin transitions and a light-induced excited spin-state trapping (LIESST) effect. In solvatomorph 2, a robust structure is formed with channels that enable the entrance or removal of solvent molecules by vapor diffusion without losing the crystallinity. Thus, solvent-exchanged samples [Fe(bpCOOEt2p)2](ClO4)2·MeNO2 (2·MeNO 2 ), [Fe(bpCOOEt2p)2](ClO4)2·MeCN (2·MeCN), [Fe(bpCOOEt2p)2](ClO4)2·0.5Me2CO (2·Me 2 CO), and [Fe(bpCOOEt2p)2](ClO4)2·MeCOOH (2·MeCOOH) were prepared by vapor diffusion of the solvents in a crystal of the compound previously heated to 400 K in a single-crystal to single-crystal (SCSC) fashion. Interestingly, this causes a change of spin state with a stabilization of the low-spin state in 2·Me 2 CO and the high-spin state in 2·MeCN. Therefore, the SCO properties of 2 can be tuned in a reversible way by exposure to different solvents.
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Affiliation(s)
- Víctor García-López
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Hanane El Mansour El Jastimi
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Jana Juráková
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
- Central
European Institute of Technology, Brno University
of Technology, Purkyn̆ova
123, 61200 Brno, Czech Republic
| | - Miguel Clemente-León
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
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16
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Sanchis-Gual R, Coronado-Puchau M, Mallah T, Coronado E. Hybrid nanostructures based on gold nanoparticles and functional coordination polymers: Chemistry, physics and applications in biomedicine, catalysis and magnetism. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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17
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Palacios-Corella M, García-López V, Waerenborgh JC, Vieira BJC, Mínguez Espallargas G, Clemente-León M, Coronado E. Redox and guest tunable spin-crossover properties in a polymeric polyoxometalate. Chem Sci 2023; 14:3048-3055. [PMID: 36937587 PMCID: PMC10016358 DOI: 10.1039/d2sc05800f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 02/21/2023] [Indexed: 02/24/2023] Open
Abstract
A bifunctionalized polyoxometalate (POM), [V6O19(C16H15N6O)2]2-, which contains a redox active hexavanadate moiety covalently linked to two tridentate 2,6-bis(pyrazol-1-yl)pyridine (1-bpp) ligands, has been prepared and characterized. Reaction of this hybrid molecule with Fe(ii) or Zn(ii) ions produces crystalline neutral 1D networks of formula Fe[V6O19(C16H15N6O)2]·solv (2) and Zn[V6O19(C16H15N6O)2]·solv (3) (solv = solvent molecules). Magnetic properties of 2 show an abrupt spin-crossover (SCO) with the temperature, which can be induced by light irradiation at 10 K (Light-Induced Excited Spin-State Trapping, LIESST effect). Interestingly, this porous and flexible structure enables reversible exchange of solvents in 2, which allows tuning the temperature of the thermal SCO. In 2 and 3, the hexavanadate unit can be reduced by electrochemical or chemical means in a reversible way. Chemical reduction and reoxidation by a postsynthetic method is accompanied by the insertion in the structure of the reductant and oxidant molecules (cobaltocene and tribromide, respectively), which provokes drastic changes in the spin state of Fe(ii). This leads to an elegant switching multifunctional material in which SCO properties of the Fe(ii) complexes coexist with the redox properties of the POM and can be tuned by a variety of stimuli such as temperature, light, solvent exchange or electron transfer. During the reduction process, 3 undergoes a single-crystal-to-single-crystal one-electron reduction, which confirms the presence of cobaltocenium cations by single crystal X-ray diffraction.
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Affiliation(s)
- Mario Palacios-Corella
- Instituto de Ciencia Molecular (ICMol), Universitat de València C/Catedrático José Beltrán 2 46980 Paterna Spain +34 963543273 +34 963544419
| | - Víctor García-López
- Instituto de Ciencia Molecular (ICMol), Universitat de València C/Catedrático José Beltrán 2 46980 Paterna Spain +34 963543273 +34 963544419
| | - Joao Carlos Waerenborgh
- Centro de Ciências e Tecnologias Nucleares, DECN, Instituto Superior Técnico, Universidade de Lisboa 2695-066 Bobadela LRS Portugal
| | - Bruno J C Vieira
- Centro de Ciências e Tecnologias Nucleares, DECN, Instituto Superior Técnico, Universidade de Lisboa 2695-066 Bobadela LRS Portugal
| | - Guillermo Mínguez Espallargas
- Instituto de Ciencia Molecular (ICMol), Universitat de València C/Catedrático José Beltrán 2 46980 Paterna Spain +34 963543273 +34 963544419
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universitat de València C/Catedrático José Beltrán 2 46980 Paterna Spain +34 963543273 +34 963544419
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València C/Catedrático José Beltrán 2 46980 Paterna Spain +34 963543273 +34 963544419
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18
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Matuszewska O, Battisti T, Ferreira RR, Biot N, Demitri N, Mézière C, Allain M, Sallé M, Mañas-Valero S, Coronado E, Fresta E, Costa RD, Bonifazi D. Tweaking the Optoelectronic Properties of S-Doped Polycyclic Aromatic Hydrocarbons by Chemical Oxidation. Chemistry 2023; 29:e202203115. [PMID: 36333273 DOI: 10.1002/chem.202203115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/04/2022] [Accepted: 11/04/2022] [Indexed: 11/07/2022]
Abstract
Peri-thiaxanthenothiaxanthene, an S-doped analog of peri-xanthenoxanthene, is used as a polycyclic aromatic hydrocarbon (PAH) scaffold to tune the molecular semiconductor properties by editing the oxidation state of the S-atoms. Chemical oxidation of peri-thiaxanthenothiaxanthene with H2 O2 led to the relevant sulfoxide and sulfone congeners, whereas electrooxidation gave access to sulfonium-type derivatives forming crystalline mixed valence (MV) complexes. These complexes depicted peculiar molecular and solid-state arrangements with face-to-face π-π stacking organization. Photophysical studies showed a widening of the optical bandgap upon progressive oxidation of the S-atoms, with the bis-sulfone derivative displaying the largest value (E00 =2.99 eV). While peri-thiaxanthenothiaxanthene showed reversible oxidation properties, the sulfoxide and sulfone derivatives mainly showed reductive events, corroborating their n-type properties. Electric measurements of single crystals of the MV complexes exhibited a semiconducting behavior with a remarkably high conductivity at room temperature (10-1 -10-2 S cm-1 and 10-2 -10-3 S cm-1 for the O and S derivatives, respectively), one of the highest reported so far. Finally, the electroluminescence properties of the complexes were tested in light-emitting electrochemical cells (LECs), obtaining the first S-doped mid-emitting PAH-based LECs.
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Affiliation(s)
- Oliwia Matuszewska
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Tommaso Battisti
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Ruben R Ferreira
- Institute of Organic Chemistry, University of Vienna, 1090, Vienna, Austria
| | - Nicolas Biot
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Cécile Mézière
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Magali Allain
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Marc Sallé
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Elisa Fresta
- Chair of Biogenic Functional Materials, Technical University Munich, Schulgasse 22, 94315, Straubing, Germany
| | - Rubén D Costa
- Chair of Biogenic Functional Materials, Technical University Munich, Schulgasse 22, 94315, Straubing, Germany
| | - Davide Bonifazi
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.,Institute of Organic Chemistry, University of Vienna, 1090, Vienna, Austria
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19
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Matthiesen M, Hortensius JR, Mañas-Valero S, Kapon I, Dumcenco D, Giannini E, Šiškins M, Ivanov BA, van der Zant HSJ, Coronado E, Kuzmenko AB, Afanasiev D, Caviglia AD. Controlling Magnetism with Light in a Zero Orbital Angular Momentum Antiferromagnet. Phys Rev Lett 2023; 130:076702. [PMID: 36867817 DOI: 10.1103/physrevlett.130.076702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 11/17/2022] [Accepted: 12/21/2022] [Indexed: 06/18/2023]
Abstract
Antiferromagnetic materials feature intrinsic ultrafast spin dynamics, making them ideal candidates for future magnonic devices operating at THz frequencies. A major focus of current research is the investigation of optical methods for the efficient generation of coherent magnons in antiferromagnetic insulators. In magnetic lattices endowed with orbital angular momentum, spin-orbit coupling enables spin dynamics through the resonant excitation of low-energy electric dipoles such as phonons and orbital resonances which interact with spins. However, in magnetic systems with zero orbital angular momentum, microscopic pathways for the resonant and low-energy optical excitation of coherent spin dynamics are lacking. Here, we consider experimentally the relative merits of electronic and vibrational excitations for the optical control of zero orbital angular momentum magnets, focusing on a limit case: the antiferromagnet manganese phosphorous trisulfide (MnPS_{3}), constituted by orbital singlet Mn^{2+} ions. We study the correlation of spins with two types of excitations within its band gap: a bound electron orbital excitation from the singlet orbital ground state of Mn^{2+} into an orbital triplet state, which causes coherent spin precession, and a vibrational excitation of the crystal field that causes thermal spin disorder. Our findings cast orbital transitions as key targets for magnetic control in insulators constituted by magnetic centers of zero orbital angular momentum.
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Affiliation(s)
- Mattias Matthiesen
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
| | - Jorrit R Hortensius
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Itzik Kapon
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
| | - Dumitru Dumcenco
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
| | - Enrico Giannini
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
| | - Makars Šiškins
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Boris A Ivanov
- Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, Netherlands
- Institute of Magnetism, National Academy of Sciences and Ministry of Education and Science, 03142 Kyiv, Ukraine
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Alexey B Kuzmenko
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
| | - Dmytro Afanasiev
- Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, Netherlands
| | - Andrea D Caviglia
- DQMP-University of Geneva, École de Physique, 24, Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
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20
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Mertens F, Mönkebüscher D, Parlak U, Boix-Constant C, Mañas-Valero S, Matzer M, Adhikari R, Bonanni A, Coronado E, Kalashnikova AM, Bossini D, Cinchetti M. Ultrafast Coherent THz Lattice Dynamics Coupled to Spins in the van der Waals Antiferromagnet FePS 3. Adv Mater 2023; 35:e2208355. [PMID: 36437480 DOI: 10.1002/adma.202208355] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/18/2022] [Indexed: 06/16/2023]
Abstract
Coherent THz optical lattice and hybridized phonon-magnon modes are triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS3 . The laser-driven lattice and spin dynamics are investigated in a bulk crystal as well as in a 380 nm-thick exfoliated flake as a function of the excitation photon energy, sample temperature and applied magnetic field. The pump-probe magneto-optical measurements reveal that the amplitude of a coherent phonon mode oscillating at 3.2 THz decreases as the sample is heated up to the Néel temperature. This signal eventually vanishes as the phase transition to the paramagnetic phase occurs, thus revealing its connection to the long-range magnetic order. In the presence of an external magnetic field, the optically triggered 3.2 THz phonon hybridizes with a magnon mode, which is utilized to excite the hybridized phonon-magnon mode optically. These findings open a pathway toward the optical control of coherent THz photo-magnonic dynamics in a van der Waals antiferromagnet, which can be scaled down to the 2D limit.
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Affiliation(s)
- Fabian Mertens
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - David Mönkebüscher
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Umut Parlak
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Margherita Matzer
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Rajdeep Adhikari
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Alberta Bonanni
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | | | - Davide Bossini
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457, Konstanz, Germany
| | - Mirko Cinchetti
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
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21
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Seijas-Da Silva A, Carrasco JA, Vieira BJC, Waerenborgh JC, Coronado E, Abellán G. Two-dimensional magnetic behaviour in hybrid NiFe-layered double hydroxides by molecular engineering. Dalton Trans 2023; 52:1219-1228. [PMID: 36633546 DOI: 10.1039/d2dt03804h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Layered double hydroxides (LDHs) are a class of two-dimensional (2D) anionic materials that exhibit remarkable chemical versatility, making them ideal building blocks in the design of complex multifunctional materials. In this line, a NiFe-LDH is probably one of the most important LDHs due to its interesting electrochemical and magnetic properties. However, no direct magnetic measurements of exfoliated NiFe-LDH nanosheets have been reported so far. Herein, we synthesize a hybrid NiFe-LDH family through anion exchange reactions using surfactant molecules in order to increase the interlayer space (ranging from 8 to 31.6 Å), minimizing the interlayer dipolar interactions. By intercalation with octadecylsulphate, we have managed to obtain the largest interlayer space reported for a NiFe-LDH while keeping a similar size, morphology and composition. This wide interlayer separation results in a decrease in temperatures at which spontaneous magnetization (TM) occurs and the blocking temperature (TB), as well as a decrease in the coercive fields (HC). In fact, an abrupt drop in all these magnetic parameters above 30 Å interlayer distance is observed, evidencing complete magnetic decoupling of the layers. We have further validated our molecular engineering approach by characterizing the hybrid materials by Mössbauer spectroscopy and comparing the magnetic analysis results with those for a liquid phase exfoliated NiFe-LDH sample. Overall, this work provides fundamental insights into the magnetism of NiFe-LDHs, showing the potential of molecular engineering for designing hybrid layered magnetic materials approaching the 2D magnetic limit.
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Affiliation(s)
- Alvaro Seijas-Da Silva
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain.
| | - Jose Alberto Carrasco
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain.
| | - Bruno J C Vieira
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - João C Waerenborgh
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain.
| | - Gonzalo Abellán
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán Martínez, 2, 46980 Paterna, Spain.
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22
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Boix-Constant C, Mañas-Valero S, Ruiz AM, Rybakov A, Konieczny KA, Pillet S, Baldoví JJ, Coronado E. Probing the Spin Dimensionality in Single-Layer CrSBr Van Der Waals Heterostructures by Magneto-Transport Measurements. Adv Mater 2022; 34:e2204940. [PMID: 36008364 DOI: 10.1002/adma.202204940] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/22/2022] [Indexed: 06/15/2023]
Abstract
2D magnetic materials offer unprecedented opportunities for fundamental and applied research in spintronics and magnonics. Beyond the pioneering studies on 2D CrI3 and Cr2 Ge2 Te6 , the field has expanded to 2D antiferromagnets exhibiting different spin anisotropies and textures. Of particular interest is the layered metamagnet CrSBr, a relatively air-stable semiconductor formed by antiferromagnetically-coupled ferromagnetic layers (Tc ∼150 K) that can be exfoliated down to the single-layer. It presents a complex magnetic behavior with a dynamic magnetic crossover, exhibiting a low-temperature hidden-order below T*∼40 K. Here, the magneto-transport properties of CrSBr vertical heterostructures in the 2D limit are inspected. The results demonstrate the marked low-dimensional character of the ferromagnetic monolayer, with short-range correlations above Tc and an Ising-type in-plane anisotropy, being the spins spontaneously aligned along the easy axis b below Tc . By applying moderate magnetic fields along a and c axes, a spin-reorientation occurs, leading to a magnetoresistance enhancement below T*. In multilayers, a spin-valve behavior is observed, with negative magnetoresistance strongly enhanced along the three directions below T*. These results show that CrSBr monolayer/bilayer provides an ideal platform for studying and controlling field-induced phenomena in two-dimensions, offering new insights regarding 2D magnets and their integration into vertical spintronic devices.
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Affiliation(s)
- Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Alberto M Ruiz
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Andrey Rybakov
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | | | | | - José J Baldoví
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain
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23
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Gavara-Edo M, Córdoba R, Valverde-Muñoz FJ, Herrero-Martín J, Real JA, Coronado E. Electrical Sensing of the Thermal and Light-Induced Spin Transition in Robust Contactless Spin-Crossover/Graphene Hybrid Devices. Adv Mater 2022; 34:e2202551. [PMID: 35766419 DOI: 10.1002/adma.202202551] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Hybrid devices based on spin-crossover (SCO)/2D heterostructures grant a highly sensitive platform to detect the spin transition in the molecular SCO component and tune the properties of the 2D material. However, the fragility of the SCO materials upon thermal treatment, light irradiation, or contact with surfaces and the methodologies used for their processing have limited their applicability. Here, an easily processable and robust SCO/2D hybrid device with outstanding performance based on the sublimable SCO [Fe(Pyrz)2 ] molecule deposited over chemical vapor deposition (CVD) graphene is reported, which is fully compatible with electronics industry protocols. Thus, a novel methodology based on growing an elusive polymorph of [Fe(Pyrz)2 ] (tetragonal phase) over graphene is developed that allows a fast and effective light-induced spin transition in the devices (≈50% yield in 5 min) to be detected electrically. Such performance can be enhanced even more when a flexible polymeric layer of poly(methyl methacrylate) is inserted in between the two active components in a contactless configuration, reaching a ≈100% yield in 5 min.
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Affiliation(s)
- Miguel Gavara-Edo
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Rosa Córdoba
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | | | | | - José Antonio Real
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Eugenio Coronado
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
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24
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Ramos M, Marques-Moros F, Esteras DL, Mañas-Valero S, Henríquez-Guerra E, Gadea M, Baldoví JJ, Canet-Ferrer J, Coronado E, Calvo MR. Photoluminescence Enhancement by Band Alignment Engineering in MoS 2/FePS 3 van der Waals Heterostructures. ACS Appl Mater Interfaces 2022; 14:33482-33490. [PMID: 35839147 PMCID: PMC9335528 DOI: 10.1021/acsami.2c05464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/04/2022] [Indexed: 05/08/2023]
Abstract
Single-layer semiconducting transition metal dichalcogenides (2H-TMDs) display robust excitonic photoluminescence emission, which can be improved by controlled changes to the environment and the chemical potential of the material. However, a drastic emission quench has been generally observed when TMDs are stacked in van der Waals heterostructures, which often favor the nonradiative recombination of photocarriers. Herein, we achieve an enhancement of the photoluminescence of single-layer MoS2 on top of van der Waals FePS3. The optimal energy band alignment of this heterostructure preserves light emission of MoS2 against nonradiative interlayer recombination processes and favors the charge transfer from MoS2, an n-type semiconductor, to FePS3, a p-type narrow-gap semiconductor. The strong depletion of carriers in the MoS2 layer is evidenced by a dramatic increase in the spectral weight of neutral excitons, which is strongly modulated by the thickness of the FePS3 underneath, leading to the increase of photoluminescence intensity. The present results demonstrate the potential for the rational design of van der Waals heterostructures with advanced optoelectronic properties.
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Affiliation(s)
- Maria Ramos
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
| | | | - Dorye L. Esteras
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Samuel Mañas-Valero
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | | | - Marcos Gadea
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
| | - José J. Baldoví
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Josep Canet-Ferrer
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - M. Reyes Calvo
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
- Instituto
Universitario de Materiales de Alicante (IUMA), Universidad de Alicante, Alicante 03690, Spain
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25
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Seijas-Da Silva A, Oestreicher V, Coronado E, Abellán G. Influence of Fe-clustering on the water oxidation performance of two-dimensional layered double hydroxides. Dalton Trans 2022; 51:4675-4684. [PMID: 35212688 PMCID: PMC8939052 DOI: 10.1039/d1dt03737d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Among the two-dimensional (2D) materials family, layered double hydroxides (LDHs) represent a key member due to their unparalleled chemical versatility. In particular, Fe-based LDHs are distinguished candidates due to their high efficiency as oxygen evolution reaction (OER) electrocatalysts. Herein, we have selected MgFe-based LDH phases as model systems in order to decipher whether Fe-clustering exerts an effect on the OER performance. For that, we have optimized hydrothermal synthesis by using triethanolamine (TEA) as the chelating agent. The magnetic characterisation allows us to identify the Fe-clustering degree by following both magnetic susceptibility as well as magnetization values at 2 K. Thanks to this, we demonstrated that TEA induces an increment in Fe-clustering. Electrochemical OER measurements show that both samples behave identically by using glassy carbon electrodes. Interestingly, when the samples are tested in the most commonly employed electrode, nickel foam, striking differences arise. The sample exhibiting a lower Fe-clustering behaves as a better electrocatalyst with a reduction of the overpotential values of more than 50 mV to reach 100 mA cm-2, as a consequence of a favoured surface transformation of MgFe-LDHs phases into more reactive oxyhydroxide NiFe-based phases during the electrochemical tests. Hence, this work alerts about the importance of the electrocatalyst-electrode collector interactions which can induce misinterpretations in the OER performance.
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Affiliation(s)
- Alvaro Seijas-Da Silva
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
| | - Víctor Oestreicher
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
| | - Gonzalo Abellán
- Instituto de Ciencia Molecular (ICMol), Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
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26
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Boix-Constant C, García-López V, Navarro-Moratalla E, Clemente-León M, Zafra JL, Casado J, Guinea F, Mañas-Valero S, Coronado E. Strain Switching in van der Waals Heterostructures Triggered by a Spin-Crossover Metal-Organic Framework. Adv Mater 2022; 34:e2110027. [PMID: 35032055 DOI: 10.1002/adma.202110027] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/10/2022] [Indexed: 05/24/2023]
Abstract
Van der Waals heterostructures (vdWHs) provide the possibility of engineering new materials with emergent functionalities that are not accessible in another way. These heterostructures are formed by assembling layers of different materials used as building blocks. Beyond inorganic 2D crystals, layered molecular materials remain still rather unexplored, with only few examples regarding their isolation as atomically thin layers. Here, the family of van der Waals heterostructures is enlarged by introducing a molecular building block able to produce strain: the so-called spin-crossover (SCO). In these metal-organic materials, a spin transition can be induced by applying external stimuli like light, temperature, pressure, or an electric field. In particular, smart vdWHs are prepared in which the electronic and optical properties of the 2D material (graphene and WSe2 ) are clearly switched by the strain concomitant to the spin transition. These molecular/inorganic vdWHs represent the deterministic incorporation of bistable molecular layers with other 2D crystals of interest in the emergent fields of straintronics and band engineering in low-dimensional materials.
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Affiliation(s)
- Carla Boix-Constant
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Víctor García-López
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Efrén Navarro-Moratalla
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - José Luis Zafra
- Department of Physical Chemistry, University of Málaga, Campus de Teatinos s/n, Málaga, 229071, Spain
| | - Juan Casado
- Department of Physical Chemistry, University of Málaga, Campus de Teatinos s/n, Málaga, 229071, Spain
| | - Francisco Guinea
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA- Nanociencia), Calle Farady 9, Cantoblanco, Madrid, 28049, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
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27
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López-Cabrelles J, Mañas-Valero S, Vitórica-Yrezábal IJ, Bereciartua PJ, Coronado E, Mínguez Espallargas G. A fluorinated 2D magnetic coordination polymer. Dalton Trans 2022; 51:1861-1865. [PMID: 35018913 DOI: 10.1039/d1dt03734j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we show the versatility of coordination chemistry to design and expand a family of 2D materials by incorporating F groups at the surface of the layers. Through the use of a prefuntionalized organic linker with F groups, it is possible to achieve a layered magnetic material based on Fe(II) centers that are chemically stable in open air, contrary to the known 2D inorganic magnetic materials. The high quality of the single crystals and their robustness allow to fabricate 2D molecular materials by micromechanical exfoliation, preserving the crystalline nature of these layers together with the desired functionalization.
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Affiliation(s)
- Javier López-Cabrelles
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | | | - Pablo J Bereciartua
- Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Av. de los Naranjos, s/n, 46022 Valencia, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Guillermo Mínguez Espallargas
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
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28
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Monni N, Baldoví JJ, García-López V, Oggianu M, Cadoni E, Quochi F, Clemente-León M, Mercuri ML, Coronado E. Reversible tuning of luminescence and magnetism in a structurally flexible erbium–anilato MOF. Chem Sci 2022; 13:7419-7428. [PMID: 35872828 PMCID: PMC9242018 DOI: 10.1039/d2sc00769j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/10/2022] [Indexed: 12/26/2022] Open
Abstract
By combining 3,6-N-ditriazolyl-2,5-dihydroxy-1,4-benzoquinone (H2trz2An) with NIR-emitting ErIII ions, two different 3D neutral polymorphic frameworks (1a and 1b), differing in the number of uncoordinated water molecules, formulated as [Er2(trz2An)3(H2O)4]n·xH2O (x = 10, a; x = 7, b), have been obtained. The structure of 1a shows layers with (6,3) topology forming six-membered rings with distorted hexagonal cavities along the bc plane. These 2D layers are interconnected through the N4 atoms of the two pendant arms of the trz2An linkers, leading to a 3D framework, where neighboring layers are eclipsed along the a axis, with hexagonal channels filled with water molecules. In 1b, layers with (6,3) topology in the [101] plane are present, each ErIII ion being connected to three other ErIII ions through bis-bidentate trz2An linkers, forming rectangular six-membered cavities. 1a and 1b are multifunctional materials showing coexistence of NIR emission and field-induced slow relaxation of the magnetization. Remarkably, 1a is a flexible MOF, showing a reversible structural phase transition involving shrinkage/expansion from a distorted hexagonal 2D framework to a distorted 3,6-brickwall rectangular 3D structure in [Er2(trz2An)3(H2O)2]n·2H2O (1a_des). This transition is triggered by a dehydration/hydration process under mild conditions (vacuum/heating to 360 K). The partially dehydrated compound shows a sizeable change in the emission properties and an improvement of the magnetic blocking temperature with respect to the hydrated compound, mainly related to the loss of one water coordination molecule. Theoretical calculations support the experimental findings, indicating that the slight improvement observed in the magnetic properties has its origin in the change of the ligand field around the ErIII ion due to the loss of a water molecule. Tuning of luminescent and SIM properties is herein reported, in a novel flexible 3D anilato-based ErIII-MOF, displaying reversible shrinkage/expansion from a distorted hexagonal to a 3,6-brickwall rectangular structure.![]()
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Affiliation(s)
- Noemi Monni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Italy
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via Giusti 9, 50121 Firenze, Italy
| | - José J. Baldoví
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Víctor García-López
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Mariangela Oggianu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via Giusti 9, 50121 Firenze, Italy
| | - Enzo Cadoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Italy
| | - Francesco Quochi
- Dipartimento di Fisica, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via Giusti 9, 50121 Firenze, Italy
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Maria Laura Mercuri
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, 09042 Monserrato, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via Giusti 9, 50121 Firenze, Italy
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
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29
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Dreher P, Wan W, Chikina A, Bianchi M, Guo H, Harsh R, Mañas-Valero S, Coronado E, Martínez-Galera AJ, Hofmann P, Miwa JA, Ugeda MM. Proximity Effects on the Charge Density Wave Order and Superconductivity in Single-Layer NbSe 2. ACS Nano 2021; 15:19430-19438. [PMID: 34846856 PMCID: PMC8717633 DOI: 10.1021/acsnano.1c06012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/05/2021] [Indexed: 06/10/2023]
Abstract
Collective electronic states such as the charge density wave (CDW) order and superconductivity (SC) respond sensitively to external perturbations. Such sensitivity is dramatically enhanced in two dimensions (2D), where 2D materials hosting such electronic states are largely exposed to the environment. In this regard, the ineludible presence of supporting substrates triggers various proximity effects on 2D materials that may ultimately compromise the stability and properties of the electronic ground state. In this work, we investigate the impact of proximity effects on the CDW and superconducting states in single-layer (SL) NbSe2 on four substrates of diverse nature, namely, bilayer graphene (BLG), SL-boron nitride (h-BN), Au(111), and bulk WSe2. By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, we compare the electronic structure of this prototypical 2D superconductor on each substrate. We find that, even when the electronic band structure of SL-NbSe2 remains largely unaffected by the substrate except when placed on Au(111), where a charge transfer occurs, both the CDW and SC show disparate behaviors. On the insulating h-BN/Ir(111) substrate and the metallic BLG/SiC(0001) substrate, both the 3 × 3 CDW and superconducting phases persist in SL-NbSe2 with very similar properties, which reveals the negligible impact of graphene on these electronic phases. In contrast, these collective electronic phases are severely weakened and even absent on the bulk insulating WSe2 substrate and the metallic single-crystal Au(111) substrate. Our results provide valuable insights into the fragile stability of such electronic ground states in 2D materials.
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Affiliation(s)
- Paul Dreher
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018 San Sebastián, Spain
| | - Wen Wan
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018 San Sebastián, Spain
| | - Alla Chikina
- Department
of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - Marco Bianchi
- Department
of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - Haojie Guo
- Departamento
de Física de la Materia Condensada, Universidad Autonoma de Madrid, Madrid E-28049, Spain
| | - Rishav Harsh
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018 San Sebastián, Spain
| | - Samuel Mañas-Valero
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, c/
Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, c/
Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Antonio J. Martínez-Galera
- Departamento
de Física de la Materia Condensada, Universidad Autonoma de Madrid, Madrid E-28049, Spain
- Insitituto
Nicolás Cabrera, Universidad Autnoma
de Madrid, Madrid E-28049, Spain
| | - Philip Hofmann
- Department
of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - Jill A. Miwa
- Department
of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
| | - Miguel M. Ugeda
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018 San Sebastián, Spain
- Centro
de Física de Materiales (CSIC-UPV-EHU), Paseo Manuel de Lardizábal 5, 20018 San Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, 48013 Bilbao, Spain
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30
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Brotons-Alcázar I, Torres-Cavanillas R, Morant-Giner M, Cvikl M, Mañas-Valero S, Forment-Aliaga A, Coronado E. Molecular stabilization of chemically exfoliated bare MnPS 3 layers. Dalton Trans 2021; 50:16281-16289. [PMID: 34730586 DOI: 10.1039/d1dt02536h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal chalcogenophosphates of general formula MPX3 have attracted recent interest in the field of 2D materials due to the possibility of tuning their properties upon reaching the 2D limit. Several works address this challenge by dry mechanical exfoliation. However, only a few of them use a scalable approach. In this work, we apply a general chemical protocol to exfoliate MnPS3. The method employs in the first step chemical intercalation and liquid phase exfoliation and in the second step the addition of molecules used as capping agents on the inorganic layers. Therefore, molecules of different nature prompt the quality of the exfoliated material and its stabilization in an aqueous solution, opening the possibility of using these functionalized layers in several fields. Here we illustrate this possibility in electrochemistry. Thus, we show that when polyethylenimine is used as the capping agent, it is possible to reach a compromise between the stability of high quality MnPS3 flakes in aqueous suspension and their optimum performance as an electrocatalytic system for HER activity.
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Affiliation(s)
- Isaac Brotons-Alcázar
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Marc Morant-Giner
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Martin Cvikl
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Alicia Forment-Aliaga
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
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31
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López-Cabrelles J, Mañas-Valero S, Vitórica-Yrezábal IJ, Šiškins M, Lee M, Steeneken PG, van der Zant HSJ, Mínguez Espallargas G, Coronado E. Chemical Design and Magnetic Ordering in Thin Layers of 2D Metal-Organic Frameworks (MOFs). J Am Chem Soc 2021; 143:18502-18510. [PMID: 34723487 PMCID: PMC8587609 DOI: 10.1021/jacs.1c07802] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Indexed: 11/28/2022]
Abstract
Through rational chemical design, and thanks to the hybrid nature of metal-organic frameworks (MOFs), it is possible to prepare molecule-based 2D magnetic materials stable at ambient conditions. Here, we illustrate the versatility of this approach by changing both the metallic nodes and the ligands in a family of layered MOFs that allows the tuning of their magnetic properties. Specifically, the reaction of benzimidazole-type ligands with different metal centers (MII = Fe, Co, Mn, Zn) in a solvent-free synthesis produces a family of crystalline materials, denoted as MUV-1(M), which order antiferromagnetically with critical temperatures that depend on M. Furthermore, the incorporation of additional substituents in the ligand results in a novel system, denoted as MUV-8, formed by covalently bound magnetic double layers interconnected by van der Waals interactions, a topology that is very rare in the field of 2D materials and unprecedented for 2D magnets. These layered materials are robust enough to be mechanically exfoliated down to a few layers with large lateral dimensions. Finally, the robustness and crystallinity of these layered MOFs allow the fabrication of nanomechanical resonators that can be used to detect─through laser interferometry─the magnetic order in thin layers of these 2D molecule-based antiferromagnets.
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Affiliation(s)
- Javier López-Cabrelles
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, c/Catedrático
José Beltrán, 2, 46980 Paterna, Spain
| | - Samuel Mañas-Valero
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, c/Catedrático
José Beltrán, 2, 46980 Paterna, Spain
| | | | - Makars Šiškins
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Martin Lee
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Peter G. Steeneken
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Department
of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Herre S. J. van der Zant
- Kavli
Institute of Nanoscience, Delft University
of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Guillermo Mínguez Espallargas
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, c/Catedrático
José Beltrán, 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universidad
de Valencia, c/Catedrático
José Beltrán, 2, 46980 Paterna, Spain
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32
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Torres-Cavanillas R, Morant-Giner M, Escorcia-Ariza G, Dugay J, Canet-Ferrer J, Tatay S, Cardona-Serra S, Giménez-Marqués M, Galbiati M, Forment-Aliaga A, Coronado E. Spin-crossover nanoparticles anchored on MoS 2 layers for heterostructures with tunable strain driven by thermal or light-induced spin switching. Nat Chem 2021; 13:1101-1109. [PMID: 34621077 DOI: 10.1038/s41557-021-00795-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/11/2021] [Indexed: 11/09/2022]
Abstract
In the past few years, the effect of strain on the optical and electronic properties of MoS2 layers has attracted particular attention as it can improve the performance of optoelectronic and spintronic devices. Although several approaches have been explored, strain is typically externally applied on the two-dimensional material. In this work, we describe the preparation of a reversible 'self-strainable' system in which the strain is generated at the molecular level by one component of a MoS2-based composite material. Spin-crossover nanoparticles were covalently grafted onto functionalized layers of semiconducting MoS2 to form a hybrid heterostructure. Their ability to switch between two spin states on applying an external stimulus (light irradiation or temperature change) serves to generate strain over the MoS2 layer. A volume change accompanies this spin crossover, and the created strain induces a substantial and reversible change of the electrical and optical properties of the heterostructure.
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Affiliation(s)
| | - Marc Morant-Giner
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Julien Dugay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Sergio Tatay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | | | - Marta Galbiati
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain.
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33
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Blockmon AL, Ullah A, Hughey KD, Duan Y, O'Neal KR, Ozerov M, Baldoví JJ, Aragó J, Gaita-Ariño A, Coronado E, Musfeldt JL. Spectroscopic Analysis of Vibronic Relaxation Pathways in Molecular Spin Qubit [Ho(W 5O 18) 2] 9-: Sparse Spectra Are Key. Inorg Chem 2021; 60:14096-14104. [PMID: 34415149 DOI: 10.1021/acs.inorgchem.1c01474] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vibrations play a prominent role in magnetic relaxation processes of molecular spin qubits as they couple to spin states, leading to the loss of quantum information. Direct experimental determination of vibronic coupling is crucial to understand and control the spin dynamics of these nano-objects, which represent the limit of miniaturization for quantum devices. Herein, we measure the magneto-infrared properties of the molecular spin qubit system Na9[Ho(W5O18)2]·35H2O. Our results place significant constraints on the pattern of crystal field levels and the vibrational excitations allowing us to unravel vibronic decoherence pathways in this system. We observe field-induced spectral changes near 63 and 370 cm-1 that are modeled in terms of odd-symmetry vibrations mixed with f-manifold crystal field excitations. The overall extent of vibronic coupling in Na9[Ho(W5O18)2]·35H2O is limited by a modest coupling constant (on the order of 0.25) and a transparency window in the phonon density of states that acts to keep the intramolecular vibrations and MJ levels apart. These findings advance the understanding of vibronic coupling in a molecular magnet with atomic clock transitions and suggest strategies for designing molecular spin qubits with improved coherence lifetimes.
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Affiliation(s)
- Avery L Blockmon
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Aman Ullah
- Instituto de Ciencia Molecular, Universitat de Valencia, Paterna 46980, Spain
| | - Kendall D Hughey
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Yan Duan
- Instituto de Ciencia Molecular, Universitat de Valencia, Paterna 46980, Spain
| | - Kenneth R O'Neal
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Mykhaylo Ozerov
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - José J Baldoví
- Instituto de Ciencia Molecular, Universitat de Valencia, Paterna 46980, Spain
| | - Juan Aragó
- Instituto de Ciencia Molecular, Universitat de Valencia, Paterna 46980, Spain
| | | | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de Valencia, Paterna 46980, Spain
| | - Janice L Musfeldt
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States.,Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, United States
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34
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Hu Z, Ullah A, Prima‐Garcia H, Chin S, Wang Y, Aragó J, Shi Z, Gaita‐Ariño A, Coronado E. Binding Sites, Vibrations and Spin-Lattice Relaxation Times in Europium(II)-Based Metallofullerene Spin Qubits. Chemistry 2021; 27:13242-13248. [PMID: 34268813 PMCID: PMC8518920 DOI: 10.1002/chem.202101922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Indexed: 11/06/2022]
Abstract
To design molecular spin qubits with enhanced quantum coherence, a control of the coupling between the local vibrations and the spin states is crucial, which could be realized in principle by engineering molecular structures via coordination chemistry. To this end, understanding the underlying structural factors that govern the spin relaxation is a central topic. Here, we report the investigation of the spin dynamics in a series of chemically designed europium(II)-based endohedral metallofullerenes (EMFs). By introducing a unique structural difference, i. e. metal-cage binding site, while keeping other molecular parameters constant between different complexes, these manifest the key role of the three low-energy metal-displacing vibrations in mediating the spin-lattice relaxation times (T1 ). The temperature dependence of T1 can thus be normalized by the frequencies of these low energy vibrations to show an unprecedentedly universal behavior for EMFs in frozen CS2 solution. Our theoretical analysis indicates that this structural difference determines not only the vibrational rigidity but also spin-vibration coupling in these EMF-based qubit candidates.
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Affiliation(s)
- Ziqi Hu
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
- National Laboratory for Molecular SciencesState Key Laboratory of Rare Earth Materials Chemistryand ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871People's Republic of China
| | - Aman Ullah
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
| | - Helena Prima‐Garcia
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
| | - Sang‐Hyun Chin
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
| | - Yuanyuan Wang
- National Laboratory for Molecular SciencesState Key Laboratory of Rare Earth Materials Chemistryand ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871People's Republic of China
| | - Juan Aragó
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
| | - Zujin Shi
- National Laboratory for Molecular SciencesState Key Laboratory of Rare Earth Materials Chemistryand ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871People's Republic of China
| | - Alejandro Gaita‐Ariño
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
| | - Eugenio Coronado
- Instituto de Ciencia MolecularUniversidad de ValenciaC/Catedrático José Beltrán 246980PaternaSpain
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35
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Ullah A, Baldoví JJ, Gaita-Ariño A, Coronado E. Insights on the coupling between vibronically active molecular vibrations and lattice phonons in molecular nanomagnets. Dalton Trans 2021; 50:11071-11076. [PMID: 34323911 DOI: 10.1039/d1dt01832a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Spin-lattice relaxation is a key open problem to understand the spin dynamics of single-molecule magnets and molecular spin qubits. While modelling the coupling between spin states and local vibrations allows to determine the more relevant molecular vibrations for spin relaxation, this is not sufficient to explain how energy is dissipated towards the thermal bath. Herein, we employ a simple and efficient model to examine the coupling of local vibrational modes with long-wavelength longitudinal and transverse phonons in the clock-like spin qubit [Ho(W5O18)2]9-. We find that in crystals of this polyoxometalate the vibrational mode previously found to be vibronically active at low temperature does not couple significantly to lattice phonons. This means that further intramolecular energy transfer via anharmonic vibrations is necessary for spin relaxation in this system. Finally, we discuss implications for the spin-phonon coupling of [Ho(W5O18)2]9- deposited on a MgO (001) substrate, offering a simple methodology that can be extrapolated to estimate the effects on spin relaxation of different surfaces, including 2D materials.
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Affiliation(s)
- Aman Ullah
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán Martínez, 2, Paterna 46980, Spain.
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36
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Sanchis-Gual R, Torres-Cavanillas R, Coronado-Puchau M, Giménez-Marqués M, Coronado E. Plasmon-assisted spin transition in gold nanostar@spin crossover heterostructures. J Mater Chem C Mater 2021; 9:10811-10818. [PMID: 35360440 PMCID: PMC8900490 DOI: 10.1039/d1tc01943k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/02/2021] [Indexed: 06/01/2023]
Abstract
Herein we report the design of core@shell nanoparticles formed by a metallic Au nanostar core and a spin-crossover shell based on the coordination polymer [Fe(Htrz)2(trz)](BF4). This procedure is general and has been extended to other metallic morphologies (nanorods, nanotriangles). Thanks to the photothermal effect arising from the plasmonic properties of the Au nanostar, 60% of iron centers undergo a thermal spin transition inside the thermal hysteresis triggered by a 808 nm laser low intensity irradiation. Compared to other Au morphologies, the great advantage of the nanostar shape arises from the hot spots created at the branches of the nanostar. These hot spots give rise to large NIR absorptions, making them ideal nanostructures for efficiently converting light into heat using low energy light, like that provided by a 808 nm laser.
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Affiliation(s)
- Roger Sanchis-Gual
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Marc Coronado-Puchau
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Mónica Giménez-Marqués
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
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37
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Sanchis-Gual R, Otero TF, Coronado-Puchau M, Coronado E. Enhancing the electrocatalytic activity and stability of Prussian blue analogues by increasing their electroactive sites through the introduction of Au nanoparticles. Nanoscale 2021; 13:12676-12686. [PMID: 34477618 DOI: 10.1039/d1nr02928b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Prussian blue analogues (PBAs) have been proven as excellent Earth-abundant electrocatalysts for the oxygen evolution reaction (OER) in acidic, neutral and alkaline media. Further improvements can be achieved by increasing their electrical conductivity, but scarce attention has been paid to quantify the electroactive sites of the electrocatalyst when this enhancement occurs. In this work, we have studied how the chemical design influences the specific density of electroactive sites in different Au-PBA nanostructures. Thus, we have first obtained and fully characterized a variety of monodisperse core@shell hybrid nanoparticles of Au@PBA (PBA of NiIIFeII and CoIIFeII) with different shell sizes. Their catalytic activity is evaluated by studying the OER, which is compared to pristine PBAs and other Au-PBA heterostructures. By using the coulovoltammetric technique, we have demonstrated that the introduction of 5-10% of Au in weight in the core@shell leads to an increase in the electroactive mass and thus, to a higher density of active sites capable of taking part in the OER. This increase leads to a significant decrease in the onset potential (up to 100 mV) and an increase (up to 420%) in the current density recorded at an overpotential of 350 mV. However, the Tafel slope remains unchanged, suggesting that Au reduces the limiting potential of the catalyst with no variation in the reaction kinetics. These improvements are not observed in other Au-PBA nanostructures mainly due to a lower contact between both compounds and the Au oxidation. Hence, an Au core activates the PBA shell and increases the conductivity of the resulting hybrid, while the PBA shell prevents Au oxidation. The strong synergistic effect existing in the core@shell structure evidences the importance of the chemical design for preparing PBA-based nanostructures exhibiting better electrocatalytic performances and higher electrochemical stabilities.
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Affiliation(s)
- Roger Sanchis-Gual
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
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Park S, Barrena V, Mañas-Valero S, Baldoví JJ, Fente A, Herrera E, Mompeán F, García-Hernández M, Rubio Á, Coronado E, Guillamón I, Yeyati AL, Suderow H. Coherent coupling between vortex bound states and magnetic impurities in 2D layered superconductors. Nat Commun 2021; 12:4668. [PMID: 34344878 PMCID: PMC8333272 DOI: 10.1038/s41467-021-24531-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 06/23/2021] [Indexed: 12/04/2022] Open
Abstract
Bound states in superconductors are expected to exhibit a spatially resolved electron-hole asymmetry which is the hallmark of their quantum nature. This asymmetry manifests as oscillations at the Fermi wavelength, which is usually tiny and thus washed out by thermal broadening or by scattering at defects. Here we demonstrate theoretically and confirm experimentally that, when coupled to magnetic impurities, bound states in a vortex core exhibit an emergent axial electron-hole asymmetry on a much longer scale, set by the coherence length. We study vortices in 2H-NbSe2 and in 2H-NbSe1.8S0.2 with magnetic impurities, characterizing these with detailed Hubbard-corrected density functional calculations. We find that the induced electron-hole imbalance depends on the band character of the superconducting material. Our results show that coupling between quantum bound states in superconductors is remarkably robust and has a strong influence in tunneling measurements.
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Affiliation(s)
- Sunghun Park
- Departamento de Física Teórica de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid, Spain
| | - Víctor Barrena
- Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, Madrid, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - José J Baldoví
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
| | - Antón Fente
- Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, Madrid, Spain
| | - Edwin Herrera
- Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, Madrid, Spain
| | - Federico Mompeán
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), Madrid, Spain
| | - Mar García-Hernández
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), Madrid, Spain
| | - Ángel Rubio
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
- Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Universidad del País Vasco CFM CSIC-UPV/EHU-MPC & DIPC, San Sebastián, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Isabel Guillamón
- Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, Madrid, Spain
| | - Alfredo Levy Yeyati
- Departamento de Física Teórica de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid, Spain
| | - Hermann Suderow
- Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Unidad Asociada UAM-CSIC, Universidad Autónoma de Madrid, Madrid, Spain.
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Sanchis-Gual R, Seijas-Da Silva A, Coronado-Puchau M, Otero TF, Abellán G, Coronado E. Improving the onset potential and Tafel slope determination of earth-abundant water oxidation electrocatalysts. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138613] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Boix-Constant C, Mañas-Valero S, Córdoba R, Baldoví JJ, Rubio Á, Coronado E. Out-of-Plane Transport of 1T-TaS 2/Graphene-Based van der Waals Heterostructures. ACS Nano 2021; 15:11898-11907. [PMID: 34228445 PMCID: PMC8454993 DOI: 10.1021/acsnano.1c03012] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/01/2021] [Indexed: 05/31/2023]
Abstract
Due to their anisotropy, layered materials are excellent candidates for studying the interplay between the in-plane and out-of-plane entanglement in strongly correlated systems. A relevant example is provided by 1T-TaS2, which exhibits a multifaceted electronic and magnetic scenario due to the existence of several charge density wave (CDW) configurations. It includes quantum hidden phases, superconductivity and exotic quantum spin liquid (QSL) states, which are highly dependent on the out-of-plane stacking of the CDW. In this system, the interlayer stacking of the CDW is crucial for interpreting the underlying electronic and magnetic phase diagram. Here, atomically thin-layers of 1T-TaS2 are integrated in vertical van der Waals heterostructures based on few-layers graphene contacts and their electrical transport properties are measured. Different activation energies in the conductance and a gap at the Fermi level are clearly observed. Our experimental findings are supported by fully self-consistent DFT+U calculations, which evidence the presence of an energy gap in the few-layer limit, not necessarily coming from the formation of out-of-plane spin-paired bilayers at low temperatures, as previously proposed for the bulk. These results highlight dimensionality as a key effect for understanding quantum materials as 1T-TaS2, enabling the possible experimental realization of low-dimensional QSLs.
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Affiliation(s)
- Carla Boix-Constant
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Catedrático José Beltrán Martínez n 2, Paterna 46980, Spain
| | - Samuel Mañas-Valero
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Catedrático José Beltrán Martínez n 2, Paterna 46980, Spain
| | - Rosa Córdoba
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Catedrático José Beltrán Martínez n 2, Paterna 46980, Spain
| | - José J. Baldoví
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Catedrático José Beltrán Martínez n 2, Paterna 46980, Spain
| | - Ángel Rubio
- Max
Planck Institute for the Structure and Dynamics of Matter and Center
for Free-Electron Laser Science, Luruper Chaussee 149, 22761, Hamburg, Germany
- Nano-Bio
Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco, 20018 San Sebastian, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Catedrático José Beltrán Martínez n 2, Paterna 46980, Spain
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Calvo Galve N, Abrishamkar A, Sorrenti A, Di Rienzo L, Satta M, D'Abramo M, Coronado E, de Mello AJ, Mínguez Espallargas G, Puigmartí-Luis J. Exploiting Reaction-Diffusion Conditions to Trigger Pathway Complexity in the Growth of a MOF. Angew Chem Int Ed Engl 2021; 60:15920-15927. [PMID: 33729645 DOI: 10.1002/anie.202101611] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Indexed: 11/09/2022]
Abstract
Coordination polymers (CPs), including metal-organic frameworks (MOFs), are crystalline materials with promising applications in electronics, magnetism, catalysis, and gas storage/separation. However, the mechanisms and pathways underlying their formation remain largely undisclosed. Herein, we demonstrate that diffusion-controlled mixing of reagents at the very early stages of the crystallization process (i.e., within ≈40 ms), achieved by using continuous-flow microfluidic devices, can be used to enable novel crystallization pathways of a prototypical spin-crossover MOF towards its thermodynamic product. In particular, two distinct and unprecedented nucleation-growth pathways were experimentally observed when crystallization was triggered under microfluidic mixing. Full-atom molecular dynamics simulations also confirm the occurrence of these two distinct pathways during crystal growth. In sharp contrast, a crystallization by particle attachment was observed under bulk (turbulent) mixing. These unprecedented results provide a sound basis for understanding the growth of CPs and open up new avenues for the engineering of porous materials by using out-of-equilibrium conditions.
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Affiliation(s)
- Néstor Calvo Galve
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Afshin Abrishamkar
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Alessandro Sorrenti
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.,Departament de Química Inorgànica i Orgànica (Secció de Química Orgànica) and Institut de Quimica Teorica i Computacional, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
| | - Lorenzo Di Rienzo
- Fondazione Istituto Italiano di Tecnologia (IIT), Center for Life Nano Science, Viale Regina Elena 291, I00161, Roma, Italy
| | - Mauro Satta
- ISMN (CNR) c/o Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Marco D'Abramo
- Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Andrew J de Mello
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Guillermo Mínguez Espallargas
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Josep Puigmartí-Luis
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.,Departament de Ciència dels Materials i Química Física and Institut de Quimica Teorica i Computacional, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain.,ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
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Calvo Galve N, Abrishamkar A, Sorrenti A, Di Rienzo L, Satta M, D'Abramo M, Coronado E, Mello AJ, Mínguez Espallargas G, Puigmartí‐Luis J. Exploiting Reaction‐Diffusion Conditions to Trigger Pathway Complexity in the Growth of a MOF. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Néstor Calvo Galve
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Afshin Abrishamkar
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | - Alessandro Sorrenti
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Química Inorgànica i Orgànica (Secció de Química Orgànica) and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
| | - Lorenzo Di Rienzo
- Fondazione Istituto Italiano di Tecnologia (IIT) Center for Life Nano Science Viale Regina Elena 291 I00161 Roma Italy
| | - Mauro Satta
- ISMN (CNR) c/o Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Marco D'Abramo
- Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Andrew J. Mello
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | | | - Josep Puigmartí‐Luis
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Ciència dels Materials i Química Física and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
- ICREA Pg. Lluís Companys 23 08010 Barcelona Spain
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43
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Calvo Galve N, Abrishamkar A, Sorrenti A, Di Rienzo L, Satta M, D'Abramo M, Coronado E, Mello AJ, Mínguez Espallargas G, Puigmartí‐Luis J. Inside Cover: Exploiting Reaction‐Diffusion Conditions to Trigger Pathway Complexity in the Growth of a MOF (Angew. Chem. Int. Ed. 29/2021). Angew Chem Int Ed Engl 2021. [DOI: 10.1002/anie.202105390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Néstor Calvo Galve
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Afshin Abrishamkar
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | - Alessandro Sorrenti
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Química Inorgànica i Orgànica (Secció de Química Orgànica) and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
| | - Lorenzo Di Rienzo
- Fondazione Istituto Italiano di Tecnologia (IIT) Center for Life Nano Science Viale Regina Elena 291 I00161 Roma Italy
| | - Mauro Satta
- ISMN (CNR) c/o Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Marco D'Abramo
- Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Andrew J. Mello
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | | | - Josep Puigmartí‐Luis
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Ciència dels Materials i Química Física and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
- ICREA Pg. Lluís Companys 23 08010 Barcelona Spain
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44
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Calvo Galve N, Abrishamkar A, Sorrenti A, Di Rienzo L, Satta M, D'Abramo M, Coronado E, Mello AJ, Mínguez Espallargas G, Puigmartí‐Luis J. Innentitelbild: Exploiting Reaction‐Diffusion Conditions to Trigger Pathway Complexity in the Growth of a MOF (Angew. Chem. 29/2021). Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Néstor Calvo Galve
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Afshin Abrishamkar
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | - Alessandro Sorrenti
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Química Inorgànica i Orgànica (Secció de Química Orgànica) and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
| | - Lorenzo Di Rienzo
- Fondazione Istituto Italiano di Tecnologia (IIT) Center for Life Nano Science Viale Regina Elena 291 I00161 Roma Italy
| | - Mauro Satta
- ISMN (CNR) c/o Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Marco D'Abramo
- Department of Chemistry Sapienza University of Rome P.le Aldo Moro 5 00185 Rome Italy
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia C/ Catedrático José Beltrán, 2 46980 Paterna Spain
| | - Andrew J. Mello
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
| | | | - Josep Puigmartí‐Luis
- Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland
- Departament de Ciència dels Materials i Química Física and Institut de Quimica Teorica i Computacional Universitat de Barcelona Martí i Franquès 1 08028 Barcelona Spain
- ICREA Pg. Lluís Companys 23 08010 Barcelona Spain
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López-Cabrelles J, Escalera-Moreno L, Hu Z, Prima-García H, Espallargas GM, Gaita-Ariño A, Coronado E. Near Isotropic D4d Spin Qubits as Nodes of a Gd(III)-Based Metal-Organic Framework. Inorg Chem 2021; 60:8575-8580. [PMID: 34096277 PMCID: PMC8291595 DOI: 10.1021/acs.inorgchem.1c00504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Embedding coherent spin motifs in reproducible molecular building blocks is a promising pathway for the realization of quantum technologies. Three-dimensional (3D) MOFs are a versatile platform for the rational design of extended structures employing coordination chemistry. Here, we report the synthesis and characterization of a gadolinium(III)-based MOF, [Gd(bipyNO)4](TfO)3·xMeOH (bipyNO = bipyridine,N,N'-dioxide; TfO = triflate; and MeOH = methanol) (quMOF-1), which presents a unique coordination geometry that leads to a tiny magnetic anisotropy (in terms of D, an equivalent zero-field splitting would be achieved by D = 0.006 cm-1) even compared with regular Gd(III) complexes. Pulsed electron paramagnetic resonance experiments on its magnetically diluted samples confirm the preservation of quantum coherence of single Gd(III) qubit units in this 3D extended molecular architecture (T2 = 612 ns and T1 = 66 μs at 3.5 K), which allows for the detection of Rabi oscillations at 40 K.
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Affiliation(s)
- Javier López-Cabrelles
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Luis Escalera-Moreno
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Ziqi Hu
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Helena Prima-García
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Guillermo Mínguez Espallargas
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Alejandro Gaita-Ariño
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
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46
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Afanasiev D, Hortensius JR, Matthiesen M, Mañas-Valero S, Šiškins M, Lee M, Lesne E, van der Zant HSJ, Steeneken PG, Ivanov BA, Coronado E, Caviglia AD. Controlling the anisotropy of a van der Waals antiferromagnet with light. Sci Adv 2021; 7:eabf3096. [PMID: 34078601 PMCID: PMC8172129 DOI: 10.1126/sciadv.abf3096] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 04/16/2021] [Indexed: 05/26/2023]
Abstract
Van der Waals magnets provide an ideal playground to explore the fundamentals of low-dimensional magnetism and open opportunities for ultrathin spin-processing devices. The Mermin-Wagner theorem dictates that as in reduced dimensions isotropic spin interactions cannot retain long-range correlations, the long-range spin order is stabilized by magnetic anisotropy. Here, using ultrashort pulses of light, we control magnetic anisotropy in the two-dimensional van der Waals antiferromagnet NiPS3 Tuning the photon energy in resonance with an orbital transition between crystal field split levels of the nickel ions, we demonstrate the selective activation of a subterahertz magnon mode with markedly two-dimensional behavior. The pump polarization control of the magnon amplitude confirms that the activation is governed by the photoinduced magnetic anisotropy axis emerging in response to photoexcitation of ground state electrons to states with a lower orbital symmetry. Our results establish pumping of orbital resonances as a promising route for manipulating magnetic order in low-dimensional (anti)ferromagnets.
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Affiliation(s)
- Dmytro Afanasiev
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.
- Department of Physics, University of Regensburg, Regensburg, Germany
| | - Jorrit R Hortensius
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Mattias Matthiesen
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol), Universitat de Valencia Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Makars Šiškins
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Martin Lee
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Edouard Lesne
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Peter G Steeneken
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - Boris A Ivanov
- Institute of Magnetism, National Academy of Sciences and Ministry of Education and Science, 03142 Kyiv, Ukraine
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de Valencia Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Andrea D Caviglia
- Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands
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Palacios-Corella M, García-López V, Sánchez-Sánchez C, Clemente-Juan JM, Clemente-León M, Coronado E. Insertion of single-ion magnets based on mononuclear Co(II) complexes into ferromagnetic oxalate-based networks. Dalton Trans 2021; 50:5931-5942. [PMID: 33949535 DOI: 10.1039/d1dt00595b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The 1 : 2 and 1 : 1 Co(ii) complexes of the L ligand (L = 6-(3,5-diamino-2,4,6-triazinyl)2,2'-bipyridine) with formulas [CoII(L)2](ClO4)2·0.5MeCN·Et2O (1) and [CoII(L)(CH3CN)2(H2O)](ClO4)2·MeCN (2) have been prepared. The structural and magnetic characterization of the two compounds shows that they contain octahedral high-spin Co(ii) and present a field-induced slow relaxation of the magnetization. 1 has been inserted into a bimetallic oxalate-based network leading to a novel achiral 3D compound of formula [CoII(L)2][MnIICrIII(ox)3]2·(solvate) (3) exhibiting ferromagnetic ordering below 4.6 K. EPR measurements suggest a weak magnetic coupling between the two sublattices.
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Affiliation(s)
- M Palacios-Corella
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - V García-López
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - C Sánchez-Sánchez
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - J M Clemente-Juan
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - M Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - E Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
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Sanchis-Gual R, Susic I, Torres-Cavanillas R, Arenas-Esteban D, Bals S, Mallah T, Coronado-Puchau M, Coronado E. The design of magneto-plasmonic nanostructures formed by magnetic Prussian Blue-type nanocrystals decorated with Au nanoparticles. Chem Commun (Camb) 2021; 57:1903-1906. [PMID: 33491696 DOI: 10.1039/d0cc08034a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We have developed a general protocol for the preparation of hybrid nanostructures formed by nanoparticles (NPs) of molecule-based magnets based on Prussian Blue Analogues (PBAs) decorated with plasmonic Au NPs of different shapes. By adjusting the pH, Au NPs can be attached preferentially along the edges of the PBA or randomly on the surface. The protocol allows tuning the plasmonic properties of the hybrids in the whole visible spectrum.
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Affiliation(s)
- Roger Sanchis-Gual
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
| | - Isidora Susic
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
| | - Daniel Arenas-Esteban
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Talal Mallah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay Cedex, France
| | - Marc Coronado-Puchau
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
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Wahab DA, Augustin M, Valero SM, Kuang W, Jenkins S, Coronado E, Grigorieva IV, Vera-Marun IJ, Navarro-Moratalla E, Evans RFL, Novoselov KS, Santos EJG. Quantum Rescaling, Domain Metastability, and Hybrid Domain-Walls in 2D CrI 3 Magnets. Adv Mater 2021; 33:e2004138. [PMID: 33346397 DOI: 10.1002/adma.202004138] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/07/2020] [Indexed: 06/12/2023]
Abstract
Higher-order exchange interactions and quantum effects are widely known to play an important role in describing the properties of low-dimensional magnetic compounds. Here, the recently discovered 2D van der Waals (vdW) CrI3 is identified as a quantum non-Heisenberg material with properties far beyond an Ising magnet as initially assumed. It is found that biquadratic exchange interactions are essential to quantitatively describe the magnetism of CrI3 but quantum rescaling corrections are required to reproduce its thermal properties. The quantum nature of the heat bath represented by discrete electron-spin and phonon-spin scattering processes induces the formation of spin fluctuations in the low-temperature regime. These fluctuations induce the formation of metastable magnetic domains evolving into a single macroscopic magnetization or even a monodomain over surface areas of a few micrometers. Such domains display hybrid characteristics of Néel and Bloch types with a narrow domain wall width in the range of 3-5 nm. Similar behavior is expected for the majority of 2D vdW magnets where higher-order exchange interactions are appreciable.
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Affiliation(s)
- Dina Abdul Wahab
- School of Mathematics and Physics, Queen's University, Belfast, BT7 1NN, UK
| | - Mathias Augustin
- School of Mathematics and Physics, Queen's University, Belfast, BT7 1NN, UK
| | - Samuel Manas Valero
- Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Wenjun Kuang
- School of Physics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Sarah Jenkins
- Department of Physics, The University of York, York, YO10 5DD, UK
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Irina V Grigorieva
- School of Physics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Ivan J Vera-Marun
- School of Physics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Efrén Navarro-Moratalla
- Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980, Paterna, Spain
| | | | - Kostya S Novoselov
- School of Physics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Department of Material Science & Engineering, National University of Singapore, Block EA, 9 Engineering Drive 1 117575, Singapore
- Chongqing 2D Materials Institute, Liangjiang New Area, Chongqing, 400714, China
| | - Elton J G Santos
- Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, UK
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50
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Oestreicher V, Hunt D, Dolle C, Borovik P, Jobbágy M, Abellán G, Coronado E. Cover Feature: The Missing Link in the Magnetism of Hybrid Cobalt Layered Hydroxides: The Odd–Even Effect of the Organic Spacer (Chem. Eur. J. 3/2021). Chemistry 2021. [DOI: 10.1002/chem.202004180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Víctor Oestreicher
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Valencia Spain
| | - Diego Hunt
- Departamento de Física de la Materia Condensada Instituto de Nanociencia y Nanotecnología, CNEA-CONICET Av. Gral. Paz 1499 1650 San Martín, Buenos Aires Argentina
| | - Christian Dolle
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Valencia Spain
| | - Paula Borovik
- Departamento de Química Inorgánica, Analítica y Química Física INQUIMAE, Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Ciudad Universitaria, Pabellón II C1428EHA, Buenos Aires Argentina
| | - Matías Jobbágy
- Departamento de Química Inorgánica, Analítica y Química Física INQUIMAE, Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Ciudad Universitaria, Pabellón II C1428EHA, Buenos Aires Argentina
| | - Gonzalo Abellán
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Valencia Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Valencia Spain
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