1
|
Ortiz Hernández N, Skoropata E, Ueda H, Burian M, Alonso JA, Staub U. Magnetoelectric effect in multiferroic nickelate perovskite YNiO 3. COMMUNICATIONS MATERIALS 2024; 5:154. [PMID: 39157450 PMCID: PMC11327100 DOI: 10.1038/s43246-024-00604-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Accepted: 08/06/2024] [Indexed: 08/20/2024]
Abstract
The interaction of magnetic order and spontaneous polarization is a fundamental coupling with the prospect for the control of electronic properties and magnetism. The connection among magnetic order, charge localization and associated metal-insulator transition (MIT) are cornerstones for materials control. Materials that combine both effects are therefore of great interest for testing models that claim the occurrence of spontaneous polarization from magnetic and charge order. One class of materials proposed to combine these functionalities is the family of RNiO3 (R: Lanthanide or Yttrium), whose members show a clear MIT and an antiferromagnetic ground state and for which an electric polarization has been predicted. Here, using resonant magnetic x-ray scattering with circular polarization and an applied electric field we show that YNiO3 possess a magnetic structure containing domains of spin-rotations that are consistent with an electric polarization. We show a reversal of the magnetic structure with the applied electric field confirming that charge ordered RNiO3 are magnetoelectric type II multiferroics with a MIT.
Collapse
Affiliation(s)
- Nazaret Ortiz Hernández
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Elizabeth Skoropata
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Hiroki Ueda
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Max Burian
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - José Antonio Alonso
- Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
| | - Urs Staub
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| |
Collapse
|
2
|
Soltan S, Macke S, Ilse SE, Pennycook T, Zhang ZL, Christiani G, Benckiser E, Schütz G, Goering E. Ferromagnetic order controlled by the magnetic interface of LaNiO 3/La 2/3Ca 1/3MnO 3 superlattices. Sci Rep 2023; 13:3847. [PMID: 36890187 PMCID: PMC9995495 DOI: 10.1038/s41598-023-30814-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/01/2023] [Indexed: 03/10/2023] Open
Abstract
Interface engineering in complex oxide superlattices is a growing field, enabling manipulation of the exceptional properties of these materials, and also providing access to new phases and emergent physical phenomena. Here we demonstrate how interfacial interactions can induce a complex charge and spin structure in a bulk paramagnetic material. We investigate a superlattice (SLs) consisting of paramagnetic LaNiO3 (LNO) and highly spin-polarized ferromagnetic La2/3Ca1/3MnO3 (LCMO), grown on SrTiO3 (001) substrate. We observed emerging magnetism in LNO through an exchange bias mechanism at the interfaces in X-ray resonant magnetic reflectivity. We find non-symmetric interface induced magnetization profiles in LNO and LCMO which we relate to a periodic complex charge and spin superstructure. High resolution scanning transmission electron microscopy images reveal that the upper and lower interfaces exhibit no significant structural variations. The different long range magnetic order emerging in LNO layers demonstrates the enormous potential of interfacial reconstruction as a tool for tailored electronic properties.
Collapse
Affiliation(s)
- S Soltan
- Physics Department, Faculty of Science, Helwan University, Helwan, Cairo, 11798, Egypt. .,Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany. .,Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany.
| | - S Macke
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - S E Ilse
- Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany
| | - T Pennycook
- EMAT, University of Antwerp Campus Groenenborger, 2020, Antwerp, Belgium.,Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090, Vienna, Austria
| | - Z L Zhang
- Erich-Schmid-Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, 8700, Leoben, Austria
| | - G Christiani
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - E Benckiser
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - G Schütz
- Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany
| | - E Goering
- Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany.
| |
Collapse
|
3
|
Bluschke M, Basak R, Barbour A, Warner AN, Fürsich K, Wilkins S, Roy S, Lee J, Christiani G, Logvenov G, Minola M, Keimer B, Mazzoli C, Benckiser E, Frano A. Imaging mesoscopic antiferromagnetic spin textures in the dilute limit from single-geometry resonant coherent x-ray diffraction. SCIENCE ADVANCES 2022; 8:eabn6882. [PMID: 35857841 PMCID: PMC9299548 DOI: 10.1126/sciadv.abn6882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The detection and manipulation of antiferromagnetic domains and topological antiferromagnetic textures are of central interest to solid-state physics. A fundamental step is identifying tools to probe the mesoscopic texture of an antiferromagnetic order parameter. In this work, we demonstrate that Bragg coherent diffractive imaging can be extended to study the mesoscopic texture of an antiferromagnetic order parameter using resonant magnetic x-ray scattering. We study the onset of the antiferromagnet transition in PrNiO3, focusing on a temperature regime in which the antiferromagnetic domains are dilute in the beam spot and the coherent diffraction pattern modulating the antiferromagnetic peak is greatly simplified. We demonstrate that it is possible to extract the arrangements and sizes of these domains from single diffraction patterns and show that the approach could be extended to a time-structured light source to study the motion of dilute domains or the motion of topological defects in an antiferromagnetic spin texture.
Collapse
Affiliation(s)
- Martin Bluschke
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Rourav Basak
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| | - Andi Barbour
- NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Ashley N Warner
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| | - Katrin Fürsich
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Stuart Wilkins
- NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Sujoy Roy
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - James Lee
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Physics, Concordia College, Moorhead, MN 56562, USA
| | - Georg Christiani
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Gennady Logvenov
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Matteo Minola
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Bernhard Keimer
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Claudio Mazzoli
- NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Eva Benckiser
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Alex Frano
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| |
Collapse
|
4
|
Qi H, Chen X, Benckiser E, Wu M, Cristiani G, Logvenov G, Keimer B, Kaiser U. Formation mechanism of Ruddlesden-Popper faults in compressive-strained ABO 3 perovskite superlattices. NANOSCALE 2021; 13:20663-20669. [PMID: 34878472 DOI: 10.1039/d1nr06830j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ruddlesden-Popper (RP) faults have emerged as a promising candidate for defect engineering in epitaxial ABO3 perovskites. Functionalities could be fine-tuned by incorporating RP faults into ABO3 thin films and superlattices. However, due to the lattice expansion at AO-AO interfaces, it is generally believed that RP faults are only energetically favorable under tensile strain. Contrary to this common cognition, here we present that compressive strain must be regarded as an alternative driving force for creating RP faults. Unlike the conventional perovskite-to-rock-salt transition, the RP faults originated from Shockley partial dislocations bounded by stacking faults on the basal plane. The edge-type partials gave rise to strain relaxation, facilitating the formation of RP faults under compressive strain. We envisage that our results will give new insights into the rational design and defect engineering in epitaxial-strained ABO3 perovskites.
Collapse
Affiliation(s)
- Haoyuan Qi
- Central Facility of Materials Science Electron Microscopy, Universität Ulm, 89081 Ulm, Germany.
- Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062 Dresden, Germany
| | - Xiaodan Chen
- Central Facility of Materials Science Electron Microscopy, Universität Ulm, 89081 Ulm, Germany.
- Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CC Utrecht, The Netherlands
| | - Eva Benckiser
- Max Planck Institute for Solid State Research and Center of Integrated Quantum Network, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Meng Wu
- Max Planck Institute for Solid State Research and Center of Integrated Quantum Network, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Georg Cristiani
- Max Planck Institute for Solid State Research and Center of Integrated Quantum Network, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Gennady Logvenov
- Max Planck Institute for Solid State Research and Center of Integrated Quantum Network, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Bernhard Keimer
- Max Planck Institute for Solid State Research and Center of Integrated Quantum Network, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Ute Kaiser
- Central Facility of Materials Science Electron Microscopy, Universität Ulm, 89081 Ulm, Germany.
| |
Collapse
|
5
|
Mundet B, Domínguez C, Fowlie J, Gibert M, Triscone JM, Alexander DTL. Near-Atomic-Scale Mapping of Electronic Phases in Rare Earth Nickelate Superlattices. NANO LETTERS 2021; 21:2436-2443. [PMID: 33685129 PMCID: PMC7995248 DOI: 10.1021/acs.nanolett.0c04538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Nanoscale mapping of the distinct electronic phases characterizing the metal-insulator transition displayed by most of the rare-earth nickelate compounds is fundamental for discovering the true nature of this transition and the possible couplings that are established at the interfaces of nickelate-based heterostructures. Here, we demonstrate that this can be accomplished by using scanning transmission electron microscopy in combination with electron energy-loss spectroscopy. By tracking how the O K and Ni L edge fine structures evolve across two different NdNiO3/SmNiO3 superlattices, displaying either one or two metal-insulator transitions depending on the individual layer thickness, we are able to determine the electronic state of each of the individual constituent materials. We further map the spatial configuration associated with their metallic/insulating regions, reaching unit cell spatial resolution. With this, we estimate the width of the metallic/insulating boundaries at the NdNiO3/SmNiO3 interfaces, which is measured to be on the order of four unit cells.
Collapse
Affiliation(s)
- Bernat Mundet
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
- Electron
Spectrometry and Microscopy Laboratory (LSME), Institute of Physics
(IPHYS), École Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Claribel Domínguez
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Jennifer Fowlie
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Marta Gibert
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - Jean-Marc Triscone
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Duncan T. L. Alexander
- Electron
Spectrometry and Microscopy Laboratory (LSME), Institute of Physics
(IPHYS), École Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| |
Collapse
|
6
|
Surface localized magnetism in transition metal doped alumina. Sci Rep 2021; 11:6410. [PMID: 33742044 PMCID: PMC7979734 DOI: 10.1038/s41598-021-85791-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/02/2021] [Indexed: 11/23/2022] Open
Abstract
Alumina is a structural ceramic that finds many uses in a broad range of applications. It is widely employed in the aerospace and biomedical sectors due to its stability at high temperatures and in harsh chemical environments. Here, we show that magnetism can be induced at alumina surfaces by doping with 3d transition metals. We analyze the electronic structure, spin magnetic moments, and spin density of \documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\alpha $$\end{document}α-Al\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$_{2}$$\end{document}2O\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$_{3}$$\end{document}3 as a function of both dopant species (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu) and depth using first principles calculations. Our results show that all dopants, with the exception of Sc, produce magnetic moments that are concentrated to the surface of alumina with varying degrees of delocalization. It is seen that all of the dopants are at least meta-stable on the surface and must overcome an energy barrier of 0.19–1.14 eV in order to diffuse from the surface into the bulk. As a result of judiciously doping with select 3d transition metals the surface of alumina can be made magnetic. This could lead to novel applications in data storage, catalysis, and biomedical engineering through an added surface functionality.
Collapse
|
7
|
Non-collinear magnetism & multiferroicity: the perovskite case. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2019-0071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The most important types of non-collinear magnetic orders that are realized in simple perovskite oxides are outlined in relation to multiferroicity. These orders are classified and rationalized in terms of a mimimal spin Hamiltonian, based on which the notion of spin-driven ferroelectricity is illustrated. These concepts find direct application in reference materials such as BiFeO3, GdFeO3 and TbMnO3 whose multiferroic properties are briefly reviewed.
Collapse
|
8
|
Abstract
The interplay of electronic correlations, multi-orbital excitations, and spin-orbit coupling is a fertile ground for new states of matter in quantum materials. Here, we report on a polarized Raman scattering study of semimetallic SrIrO3. The momentum-space selectivity of Raman scattering allows to circumvent the challenge to resolve the dynamics of charges with very different mobilities. The Raman responses of both holes and electrons display an electronic continuum extending far beyond the energies allowed in a regular Fermi liquid. Analyzing this response within a memory function formalism, we extract their frequency dependent scattering rate and mass enhancement, from which we determine their DC-mobilities and electrical resistivities that agree well with transport measurement. We demonstrate that its charge dynamics is well described by a marginal Fermi liquid phenomenology, with a scattering rate close to the Planckian limit. This demonstrates the potential of this approach to investigate the charge dynamics in multi-band systems. It remains challenging to resolve the dynamics of charges with different mobilities in multi-band systems. Here, the authors report a Raman scattering study of the dynamics of holes and electrons in semimetallic SrIrO3, which is well described by a marginal Fermi liquid phenomenology, with frequency dependent scattering rates close to the Planckian limit.
Collapse
|
9
|
Kim JW, Choi Y, Middey S, Meyers D, Chakhalian J, Shafer P, Park H, Ryan PJ. Direct Evidence of the Competing Nature between Electronic and Lattice Breathing Order in Rare-Earth Nickelates. PHYSICAL REVIEW LETTERS 2020; 124:127601. [PMID: 32281874 DOI: 10.1103/physrevlett.124.127601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 02/06/2020] [Indexed: 06/11/2023]
Abstract
Correlated electrons give rise to both exotic electronic and magnetic properties in rare-earth nickelates. Here we present evidence of the interfacial coupling between two nickelate systems, EuNiO_{3} (ENO) and LaNiO_{3} (LNO), with different electronic and magnetic properties but with compatible structural registry giving rise to an electrostructural transition, unobserved in each constituent. Nominally, LNO remains in a paramagnetic-metallic R3[over ¯]c phase while orthorhombic ENO undergoes antiferromagnetic and insulating transitions. However, the ENO/LNO heterostructure displays a uniform rotational symmetry set by an entwined interface. This leads to an anomalous reduction of bond disproportionation in the ENO layer through the metal to insulator transition and concomitantly charge disproportionation opens the gap accompanied by antiferromagnetic ordering. Our results resolve a long-standing question in the physics of rare-earth nickelates, herein demonstrating that charge and bond disproportionation are competing mechanisms for the charge localization process in the rare-earth nickelate system.
Collapse
Affiliation(s)
- Jong-Woo Kim
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Yongseong Choi
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Middey
- Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - D Meyers
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Chakhalian
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - Padraic Shafer
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H Park
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, USA
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Philip J Ryan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
- School of Physical Sciences, Dublin City University, Dublin 11, Ireland
| |
Collapse
|
10
|
Wu M, Huang SZ, Zeng H, Koster G, Huang YY, Zheng JC, Wang HQ. Asymmetric response of electrical conductivity and V valence state to strain in cation-deficient Sr 1-yVO 3 ultrathin films based on absorption measurements at the V L 2- and L 3-edges. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:1687-1693. [PMID: 31490160 DOI: 10.1107/s1600577519007094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/16/2019] [Indexed: 06/10/2023]
Abstract
The correlation between electronic properties and epitaxial strain in a cation-deficient system has rarely been investigated. Cation-deficient SrVO3 films are taken as a model system to investigate the strain-dependent electrical and electronic properties. Using element- and charge-sensitive soft X-ray absorption, V L-edge absorption measurements have been performed for Sr1-yVO3 films of different thicknesses capped with 4 u.c. (unit cell) SrTiO3 layers, showing the coexistence of V4+ and V5+ in thick films. A different correlation between V valence state and epitaxial strain is observed for Sr1-yVO3 ultrathin films, i.e. a variation in V valence state is only observed for tensile-strained films. Sr1-yVO3 thin films are metallic and exhibit a thickness-driven metal-insulator transition at different critical thicknesses for tensile and compressive strains. The asymmetric response of electrical conductivity to strain observed in cation-deficient Sr1-yVO3 films will be beneficial for functional oxide electronic devices.
Collapse
Affiliation(s)
- Meng Wu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China
| | - Si Zhao Huang
- 1 MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Hui Zeng
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China
| | - Gertjan Koster
- 1 MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Yu Yang Huang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jin Cheng Zheng
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China
| | - Hui Qiong Wang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China
| |
Collapse
|
11
|
Abstract
We discuss a few possibilities of high- T c superconductivity with more than one orbital symmetry contributing to the pairing. First, we show that the high energies of orbital excitations in various cuprates suggest a simplified model with a single orbital of x 2 − y 2 symmetry doped by holes. Next, several routes towards involving both e g orbital symmetries for doped holes are discussed: (i) some give superconductivity in a CuO 2 monolayer on Bi2212 superconductors, Sr 2 CuO 4 − δ , Ba 2 CuO 4 − δ , while (ii) others as nickelate heterostructures or Eu 2 − x Sr x NiO 4 , could in principle realize it as well. At low electron filling of Ru ions, spin-orbital entangled states of t 2 g symmetry contribute in Sr 2 RuO 4 . Finally, electrons with both t 2 g and e g orbital symmetries contribute to the superconducting properties and nematicity of Fe-based superconductors, pnictides or FeSe. Some of them provide examples of orbital-selective Cooper pairing.
Collapse
|
12
|
Wang L, Stoerzinger KA, Chang L, Yin X, Li Y, Tang CS, Jia E, Bowden ME, Yang Z, Abdelsamie A, You L, Guo R, Chen J, Rusydi A, Wang J, Chambers SA, Du Y. Strain Effect on Oxygen Evolution Reaction Activity of Epitaxial NdNiO 3 Thin Films. ACS APPLIED MATERIALS & INTERFACES 2019; 11:12941-12947. [PMID: 30834739 DOI: 10.1021/acsami.8b21301] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Epitaxial strain can cause both lattice distortion and oxygen nonstoichiometry, effects that are strongly coupled at heterojunctions of complex nickelate oxides. Here we decouple these structural and chemical effects on the oxygen evolution reaction (OER) by using a set of coherently strained epitaxial NdNiO3 films. We show that within the regime where oxygen vacancies (VO) are negligible, compressive strain is favorable for the OER whereas tensile strain is unfavorable; the former induces orbital splitting, resulting in a higher occupancy in the d3 z2- r2 orbital and weaker Ni-O chemisorption. However, when the tensile strain is sufficiently large to promote VO formation, an increase in the OER is also observed. The partial reduction of Ni3+ to Ni2+ due to VO makes the eg occupancy slightly larger than unity, which is thought to account for the increased OER activity. Our work highlights that epitaxial-strain-induced lattice distortion and VO generation can be individually or collectively exploited to tune OER activity, which is important for the predictive synthesis of high-performance electrocatalysts.
Collapse
Affiliation(s)
- Le Wang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Kelsey A Stoerzinger
- School of Chemical, Biological, and Environmental Engineering , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Lei Chang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Xinmao Yin
- Department of Physics, Faculty of Science , National University of Singapore , Singapore 117542 , Singapore
| | - Yangyang Li
- Department of Material Science & Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Chi Sin Tang
- NUS Graduate School for Integrative Sciences and Engineering , National University of Singapore , Singapore 117456 , Singapore
| | - Endong Jia
- The Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering , Chinese Academy of Science , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100190 , China
| | | | | | - Amr Abdelsamie
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Lu You
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Rui Guo
- Department of Material Science & Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Jingsheng Chen
- Department of Material Science & Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Andrivo Rusydi
- Department of Physics, Faculty of Science , National University of Singapore , Singapore 117542 , Singapore
| | - Junling Wang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | | | | |
Collapse
|
13
|
Middey S, Meyers D, Kareev M, Cao Y, Liu X, Shafer P, Freeland JW, Kim JW, Ryan PJ, Chakhalian J. Disentangled Cooperative Orderings in Artificial Rare-Earth Nickelates. PHYSICAL REVIEW LETTERS 2018; 120:156801. [PMID: 29756872 DOI: 10.1103/physrevlett.120.156801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 03/06/2018] [Indexed: 05/27/2023]
Abstract
Coupled transitions between distinct ordered phases are important aspects behind the rich phase complexity of correlated oxides that hinder our understanding of the underlying phenomena. For this reason, fundamental control over complex transitions has become a leading motivation of the designer approach to materials. We have devised a series of new superlattices by combining a Mott insulator and a correlated metal to form ultrashort period superlattices, which allow one to disentangle the simultaneous orderings in RENiO_{3}. Tailoring an incommensurate heterostructure period relative to the bulk charge ordering pattern suppresses the charge order transition while preserving metal-insulator and antiferromagnetic transitions. Such selective decoupling of the entangled phases resolves the long-standing puzzle about the driving force behind the metal-insulator transition and points to the site-selective Mott transition as the operative mechanism. This designer approach emphasizes the potential of heterointerfaces for selective control of simultaneous transitions in complex materials with entwined broken symmetries.
Collapse
Affiliation(s)
- S Middey
- Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - D Meyers
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Kareev
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - Yanwei Cao
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - X Liu
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - P Shafer
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J W Freeland
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J-W Kim
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P J Ryan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Chakhalian
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| |
Collapse
|
14
|
Catalano S, Gibert M, Fowlie J, Íñiguez J, Triscone JM, Kreisel J. Rare-earth nickelates RNiO 3: thin films and heterostructures. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2018; 81:046501. [PMID: 29266004 DOI: 10.1088/1361-6633/aaa37a] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This review stands in the larger framework of functional materials by focussing on heterostructures of rare-earth nickelates, described by the chemical formula RNiO3 where R is a trivalent rare-earth R = La, Pr, Nd, Sm, …, Lu. Nickelates are characterized by a rich phase diagram of structural and physical properties and serve as a benchmark for the physics of phase transitions in correlated oxides where electron-lattice coupling plays a key role. Much of the recent interest in nickelates concerns heterostructures, that is single layers of thin film, multilayers or superlattices, with the general objective of modulating their physical properties through strain control, confinement or interface effects. We will discuss the extensive studies on nickelate heterostructures as well as outline different approaches to tuning and controlling their physical properties and, finally, review application concepts for future devices.
Collapse
Affiliation(s)
- S Catalano
- DQMP, Université de Genève, 24 Quai Ernest-Ansermet, 1211 Geneva, Switzerland
| | | | | | | | | | | |
Collapse
|
15
|
Shamblin J, Heres M, Zhou H, Sangoro J, Lang M, Neuefeind J, Alonso JA, Johnston S. Experimental evidence for bipolaron condensation as a mechanism for the metal-insulator transition in rare-earth nickelates. Nat Commun 2018; 9:86. [PMID: 29311661 PMCID: PMC5758760 DOI: 10.1038/s41467-017-02561-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 12/08/2017] [Indexed: 11/08/2022] Open
Abstract
Many-body effects produce deviations from the predictions of conventional band theory in quantum materials, leading to strongly correlated phases with insulating or bad metallic behavior. One example is the rare-earth nickelates RNiO3, which undergo metal-to-insulator transitions (MITs) whose origin is debated. Here, we combine total neutron scattering and broadband dielectric spectroscopy experiments to study and compare carrier dynamics and local crystal structure in LaNiO3 and NdNiO3. We find that the local crystal structure of both materials is distorted in the metallic phase, with slow, thermally activated carrier dynamics at high temperature. We further observe a sharp change in conductivity across the MIT in NdNiO3, accompanied by slight differences in the carrier hopping time. These results suggest that changes in carrier concentration drive the MIT through a polaronic mechanism, where the (bi)polaron liquid freezes into the insulating phase across the MIT temperature.
Collapse
Affiliation(s)
- Jacob Shamblin
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN, 37996, USA
- Department of Nuclear Engineering, The University of Tennessee, Knoxville, TN, 37996, USA
| | - Maximilian Heres
- Department of Chemical and Biomolecular Engineering, The University of Tennessee, Knoxville, TN, 37996, USA
| | - Haidong Zhou
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN, 37996, USA
| | - Joshua Sangoro
- Department of Chemical and Biomolecular Engineering, The University of Tennessee, Knoxville, TN, 37996, USA
| | - Maik Lang
- Department of Nuclear Engineering, The University of Tennessee, Knoxville, TN, 37996, USA
| | - Joerg Neuefeind
- Chemical and Engineering Materials Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - J A Alonso
- Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049, Madrid, Spain
| | - Steven Johnston
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN, 37996, USA.
| |
Collapse
|
16
|
Mott Transition and Magnetism in Rare Earth Nickelates and its Fingerprint on the X-ray Scattering. Sci Rep 2017; 7:10375. [PMID: 28871182 PMCID: PMC5583322 DOI: 10.1038/s41598-017-10374-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 08/09/2017] [Indexed: 11/08/2022] Open
Abstract
The metal-insulator transition (MIT) remains among the most thoroughly studied phenomena in solid state physics, but the complexity of the phenomena, which usually involves cooperation of many degrees of freedom including orbitals, fluctuating local moments, magnetism, and the crystal structure, have resisted predictive ab-initio treatment. Here we develop ab-initio theoretical method for correlated electron materials, based on Dynamical Mean Field Theory, which can predict the change of the crystal structure across the MIT at finite temperature. This allows us to study the coupling between electronic, magnetic and orbital degrees of freedom with the crystal structure across the MIT in rare-earth nickelates. We predict the electronic free energy profile of the competing states, and the theoretical magnetic ground state configuration, which is in agreement with neutron scattering data, but is different from the magnetic models proposed before. The resonant elastic X-ray response at the K-edge, which was argued to be a probe of the charge order, is theoretically modelled within the Dynamical Mean Field Theory, including the core-hole interaction. We show that the line-shape of the measured resonant elastic X-ray response can be explained with the “site-selective” Mott scenario without real charge order on Ni sites.
Collapse
|
17
|
Vardi N, Anouchi E, Yamin T, Middey S, Kareev M, Chakhalian J, Dubi Y, Sharoni A. Ramp-Reversal Memory and Phase-Boundary Scarring in Transition Metal Oxides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1605029. [PMID: 28332323 DOI: 10.1002/adma.201605029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 02/02/2017] [Indexed: 06/06/2023]
Abstract
Transition metal oxides are complex electronic systems that exhibit a multitude of collective phenomena. Two archetypal examples are VO2 and NdNiO3 , which undergo a metal-insulator phase transition (MIT), the origin of which is still under debate. Here this study reports the discovery of a memory effect in both systems, manifested through an increase of resistance at a specific temperature, which is set by reversing the temperature ramp from heating to cooling during the MIT. The characteristics of this ramp-reversal memory effect do not coincide with any previously reported history or memory effects in manganites, electron-glass or magnetic systems. From a broad range of experimental features, supported by theoretical modelling, it is found that the main ingredients for the effect to arise are the spatial phase separation of metallic and insulating regions during the MIT and the coupling of lattice strain to the local transition temperature of the phase transition. We conclude that the emergent memory effect originates from phase boundaries at the reversal temperature leaving "scars" in the underlying lattice structure, giving rise to a local increase in the transition temperature. The universality and robustness of the effect shed new light on the MIT in complex oxides.
Collapse
Affiliation(s)
- Naor Vardi
- Department of Physics, Bar Ilan University, Ramat-Gan, IL, 5290002, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, IL, 5290002, Israel
| | - Elihu Anouchi
- Department of Physics, Bar Ilan University, Ramat-Gan, IL, 5290002, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, IL, 5290002, Israel
| | - Tony Yamin
- Department of Physics, Bar Ilan University, Ramat-Gan, IL, 5290002, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, IL, 5290002, Israel
| | - Srimanta Middey
- Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Michael Kareev
- Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Jak Chakhalian
- Department of Physics, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Yonatan Dubi
- Department of Chemistry, Ben Gurion University, Be'er Sheva, IL, 841050, Israel
- Ilse-Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be'er Sheva, IL, 8410501, Israel
| | - Amos Sharoni
- Department of Physics, Bar Ilan University, Ramat-Gan, IL, 5290002, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, IL, 5290002, Israel
| |
Collapse
|
18
|
Pure electronic metal-insulator transition at the interface of complex oxides. Sci Rep 2016; 6:27934. [PMID: 27324948 PMCID: PMC4914986 DOI: 10.1038/srep27934] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/24/2016] [Indexed: 11/24/2022] Open
Abstract
In complex materials observed electronic phases and transitions between them often involve coupling between many degrees of freedom whose entanglement convolutes understanding of the instigating mechanism. Metal-insulator transitions are one such problem where coupling to the structural, orbital, charge, and magnetic order parameters frequently obscures the underlying physics. Here, we demonstrate a way to unravel this conundrum by heterostructuring a prototypical multi-ordered complex oxide NdNiO3 in ultra thin geometry, which preserves the metal-to-insulator transition and bulk-like magnetic order parameter, but entirely suppresses the symmetry lowering and long-range charge order parameter. These findings illustrate the utility of heterointerfaces as a powerful method for removing competing order parameters to gain greater insight into the nature of the transition, here revealing that the magnetic order generates the transition independently, leading to an exceptionally rare purely electronic metal-insulator transition with no symmetry change.
Collapse
|
19
|
Kim TH, Puggioni D, Yuan Y, Xie L, Zhou H, Campbell N, Ryan PJ, Choi Y, Kim JW, Patzner JR, Ryu S, Podkaminer JP, Irwin J, Ma Y, Fennie CJ, Rzchowski MS, Pan XQ, Gopalan V, Rondinelli JM, Eom CB. Polar metals by geometric design. Nature 2016; 533:68-72. [DOI: 10.1038/nature17628] [Citation(s) in RCA: 215] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 02/22/2016] [Indexed: 11/09/2022]
|
20
|
Bousquet E, Cano A. Non-collinear magnetism in multiferroic perovskites. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:123001. [PMID: 26912212 DOI: 10.1088/0953-8984/28/12/123001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present an overview of the current interest in non-collinear magnetism in multiferroic perovskite crystals. We first describe the different microscopic mechanisms giving rise to the non-collinearity of spins in this class of materials. We discuss, in particular, the interplay between non-collinear magnetism and ferroelectric and antiferrodistortive distortions of the perovskite structure, and how this can promote magnetoelectric responses. We then provide a literature survey on non-collinear multiferroic perovskites. We discuss numerous examples of spin cantings driving weak ferromagnetism in transition metal perovskites, and of spin-induced ferroelectricity as observed in the rare-earth based perovskites. These examples are chosen to best illustrate the fundamental role of non-collinear magnetism in the design of multiferroicity.
Collapse
Affiliation(s)
- Eric Bousquet
- Physique Théorique des Matériaux, Université de Liège, B-4000 Sart Tilman, Belgium
| | | |
Collapse
|
21
|
Kim G, Neumann M, Kim M, Le MD, Kang TD, Noh TW. Suppression of Three-Dimensional Charge Density Wave Ordering via Thickness Control. PHYSICAL REVIEW LETTERS 2015; 115:226402. [PMID: 26650312 DOI: 10.1103/physrevlett.115.226402] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Indexed: 05/12/2023]
Abstract
Barium bismuth oxide (BaBiO_{3}) is the end member of two families of high-T_{c} superconductors, i.e., BaPb_{1-x}Bi_{x}O_{3} and Ba_{1-x}K_{x}BiO_{3}. The undoped parent compound is an insulator, exhibiting a charge density wave that is strongly linked to a static breathing distortion in the oxygen sublattice of the perovskite structure. We report a comprehensive spectroscopic and x-ray diffraction study of BaBiO_{3} thin films, showing that the minimum film thickness required to stabilize the breathing distortion and charge density wave is ≈11 unit cells, and that both phenomena are suppressed in thinner films. Our results constitute the first experimental observation of charge density wave suppression in bismuthate compounds without intentionally introducing dopants.
Collapse
Affiliation(s)
- Gideok Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Michael Neumann
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Minu Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Manh Duc Le
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Tae Dong Kang
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| | - Tae Won Noh
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
| |
Collapse
|
22
|
Kobayashi H, Ikeda S, Yoda Y, Hirao N, Ohishi Y, Alonso JA, Martinez-Lope MJ, Lengsdorf R, Khomskii DI, Abd-Elmeguid MM. Pressure-induced unusual metallic state in EuNiO3. PHYSICAL REVIEW B 2015; 91:195148. [DOI: 10.1103/physrevb.91.195148] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|