1
|
Manley ME, Stonaha PJ, Bruno NM, Karaman I, Arroyave R, Chi S, Abernathy DL, Stone MB, Chumlyakov YI, Lynn JW. Hybrid magnon-phonon localization enhances function near ferroic glassy states. SCIENCE ADVANCES 2024; 10:eadn2840. [PMID: 38875343 PMCID: PMC11177935 DOI: 10.1126/sciadv.adn2840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 05/09/2024] [Indexed: 06/16/2024]
Abstract
Ferroic materials on the verge of forming ferroic glasses exhibit heightened functionality that is often attributed to competing long- and short-range correlations. However, the physics underlying these enhancements is not well understood. The Ni45Co5Mn36.6In13.4 Heusler alloy is on the edge of forming both spin and strain glasses and exhibits magnetic field-induced shape memory and large magnetocaloric effects, making it a candidate for multicaloric cooling applications. We show using neutron scattering that localized magnon-phonon hybrid modes, which are inherently spread across reciprocal space, act as a bridge between phonons and magnons and result in substantial magnetic field-induced shifts in the phonons, triple the caloric response, and alter phase stability. We attribute these modes to the localization of phonons and magnons by antiphase boundaries coupled to magnetic domains. Because the interplay between short- and long-range correlations is common near ferroic glassy states, our work provides general insights on how glassiness enhances function.
Collapse
Affiliation(s)
- Michael E Manley
- Materials Sciences and Technology Division, Oak Ridge National Lab, Oak Ridge, TN 37831, USA
| | - Paul J Stonaha
- Materials Sciences and Technology Division, Oak Ridge National Lab, Oak Ridge, TN 37831, USA
| | - Nickolaus M Bruno
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
- NASA Glenn Research Center, Cleveland, OH 44135, USA
| | - Ibrahim Karaman
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Raymundo Arroyave
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Songxue Chi
- Neutron Scattering Division, Oak Ridge National Lab, Oak Ridge, TN 37831, USA
| | - Douglas L Abernathy
- Neutron Scattering Division, Oak Ridge National Lab, Oak Ridge, TN 37831, USA
| | - Matthew B Stone
- Neutron Scattering Division, Oak Ridge National Lab, Oak Ridge, TN 37831, USA
| | - Yuri I Chumlyakov
- Siberian Physical Technical Institute, Tomsk State University, Tomsk, Russia
| | - Jeffrey W Lynn
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| |
Collapse
|
2
|
Liu B, Allison W, Peng B, Avidor N, Monserrat B, Jardine AP. Distinguishing Quasiparticle-Phonon Interactions by Ultrahigh-Resolution Lifetime Measurements. PHYSICAL REVIEW LETTERS 2024; 132:176202. [PMID: 38728725 DOI: 10.1103/physrevlett.132.176202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 01/22/2024] [Accepted: 03/22/2024] [Indexed: 05/12/2024]
Abstract
We present a determination of quasiparticle-phonon interaction strengths at surfaces through measurements of phonon spectra with ultrahigh energy resolution. The lifetimes of low energy surface phonons on a pristine Ru(0001) surface were determined over a wide range of temperatures and an analysis of the temperature dependence enables us to attribute separate contributions from electron-phonon interactions, phonon-phonon interactions, and defect-phonon interactions. Strong electron-phonon interactions are evident at all temperatures and we show they dominate over phonon-phonon interactions below 400 K.
Collapse
Affiliation(s)
- Boyao Liu
- SMF Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - William Allison
- SMF Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Bo Peng
- TCM Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Nadav Avidor
- SMF Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Bartomeu Monserrat
- TCM Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Andrew P Jardine
- SMF Group, Cavendish Laboratory, University of Cambridge, 19 J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| |
Collapse
|
3
|
Patra A, Pramoda K, Hegde S, K A, Mosina K, Sofer Z, Rout CS. Electrostatic co-assembly of FePS 3 nanosheets and surface functionalized BCN heterostructures for hydrogen evolution reaction. Dalton Trans 2024. [PMID: 38258579 DOI: 10.1039/d3dt03222a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Advances in the hydrogen evolution reaction (HER) are intricately connected with addressing the current energy crisis and quest for sustainable energy sources. The necessity of catalysts that are efficient and inexpensive to perform the hydrogen evolution reaction is key to this. Following the ground-breaking discovery of graphene, metal thio/seleno phosphates (MPX3: M - transition metal, P - phosphorus and X - S/Se), two dimensional (2D) materials, exhibit excellent tunable physicochemical, electronic and optical properties, and are expected to be key to the energy industry for years to come. Taking this into account, a facile time-effective electrostatic restacking synthesis procedure has been followed to synthesize a 2D/2D heterostructure (FePS3@BCN) involving FePS3, one of the prominent MPX3 materials, with borocarbonitride (BCN), for hydrogen evolution reaction (HER). The piled up nanosheets of FePS3 and BCN are held together by an electrostatic force, and display extreme robustness under the harsh conditions of HER application. The amalgamated electrocatalyst achieved an overpotential of 187 mV at a current density of 10 mA cm-2 with a shallow Tafel slope of 41 mV dec-1, following the Volmer-Heyrovsky mechanism. The resilience of the electrocatalyst has been examined through chronoamperometric testing for long term stability, and it is stable for more than 14 hours, which shows the excellent electrocatalytic activity for hydrogen evolution reaction owing to the strategic approach to the catalyst design, the use of numerous electrochemically active sites, large surface area and a barrier-free channel for quick ion transfer.
Collapse
Affiliation(s)
- Abhinandan Patra
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura Road, Bangalore - 562112, Karnataka, India.
| | - K Pramoda
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura Road, Bangalore - 562112, Karnataka, India.
| | - Shridhar Hegde
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura Road, Bangalore - 562112, Karnataka, India.
| | - Aravind K
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura Road, Bangalore - 562112, Karnataka, India.
| | - Kseniia Mosina
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Zdenek Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Chandra Sekhar Rout
- Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Kanakapura Road, Bangalore - 562112, Karnataka, India.
| |
Collapse
|
4
|
Zhang W, Xie W, Shao B, Zuo X. Electrically induced net magnetization in FePSe 3 nanoribbons: the role of edge reconstructions. NANOSCALE 2023. [PMID: 38018324 DOI: 10.1039/d3nr04656g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Magnetized edge states of nanoribbon systems open a new path for designing functional spintronic devices. Here, we introduce a general mechanism for electrically generating nonzero net magnetization in antiferromagnetic (AFM) semiconducting nanoribbons. In the proposed spin configuration, in which the empty and occupied edge states of one side close to the Fermi energy are in the same spin channel, the Zeeman-type spin splitting between the states of opposite edges arising from the electric field allow the system to be tuned from the AFM semiconducting phase to the ferromagnetic (FM) metallic phase, yielding nonzero net magnetization. Our ab initio calculations show that this strategy is realizable in the example of the FePSe3 nanoribbon, in which self-passivation-driven reconstruction at the Se termination edge gives rise to the key spin configuration. Moreover, we demonstrate that an electric field could trigger a series of electronic phase transitions among AFM semiconductor, AFM half-metal, and FM metal phases, based on which we were able to design an electronically controllable versatile spintronics device.
Collapse
Affiliation(s)
- Wenqi Zhang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China.
| | - Weifeng Xie
- School of Physics and Electronics, Central South University, Changsha 410083, China
| | - Bin Shao
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China.
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China
| | - Xu Zuo
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China.
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin 300350, China
- Engineering Research Center of Thin Film Optoelectronics Technology, Ministry of Education, Nankai University, Tianjin 300350, China
| |
Collapse
|
5
|
Strasdas J, Pestka B, Rybak M, Budniak AK, Leuth N, Boban H, Feyer V, Cojocariu I, Baranowski D, Avila J, Dudin P, Bostwick A, Jozwiak C, Rotenberg E, Autieri C, Amouyal Y, Plucinski L, Lifshitz E, Birowska M, Morgenstern M. Electronic Band Structure Changes across the Antiferromagnetic Phase Transition of Exfoliated MnPS 3 Flakes Probed by μ-ARPES. NANO LETTERS 2023; 23:10342-10349. [PMID: 37922394 DOI: 10.1021/acs.nanolett.3c02906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
Exfoliated magnetic 2D materials enable versatile tuning of magnetization, e.g., by gating or providing proximity-induced exchange interaction. However, their electronic band structure after exfoliation has not been probed, presumably due to their photochemical sensitivity. Here, we provide micrometer-scale angle-resolved photoelectron spectroscopy of the exfoliated intralayer antiferromagnet MnPS3 above and below the Néel temperature down to one monolayer. Favorable comparison with density functional theory calculations enables identifying the orbital character of the observed bands. Consistently, we find pronounced changes across the Néel temperature for bands consisting of Mn 3d and 3p levels of adjacent S atoms. The deduced orbital mixture indicates that the superexchange is relevant for the magnetic interaction. There are only minor changes between monolayer and thicker films, demonstrating the predominant 2D character of MnPS3. The novel access is transferable to other MPX3 materials (M: transition metal, P: phosphorus, X: chalcogenide), providing several antiferromagnetic arrangements.
Collapse
Affiliation(s)
- Jeff Strasdas
- II. Institute of Physics B and JARA-FIT, RWTH-Aachen University, 52074 Aachen, Germany
| | - Benjamin Pestka
- II. Institute of Physics B and JARA-FIT, RWTH-Aachen University, 52074 Aachen, Germany
| | - Miłosz Rybak
- Department of Semiconductor Materials Engineering, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, WybrzeŻe Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Adam K Budniak
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute and Helen Diller Quantum Center, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Niklas Leuth
- II. Institute of Physics B and JARA-FIT, RWTH-Aachen University, 52074 Aachen, Germany
| | - Honey Boban
- Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Vitaliy Feyer
- Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Iulia Cojocariu
- Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Daniel Baranowski
- Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, Jülich 52428, Germany
| | - José Avila
- Synchrotron-SOLEIL, Université Paris-Saclay, Saint-Aubin, BP48, Gif sur Yvette, Paris F91192, France
| | - Pavel Dudin
- Synchrotron-SOLEIL, Université Paris-Saclay, Saint-Aubin, BP48, Gif sur Yvette, Paris F91192, France
| | - Aaron Bostwick
- Advanced Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Chris Jozwiak
- Advanced Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Eli Rotenberg
- Advanced Light Source, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
| | - Carmine Autieri
- International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL-02668 Warsaw, Poland
| | - Yaron Amouyal
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Lukasz Plucinski
- Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Efrat Lifshitz
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute and Helen Diller Quantum Center, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Magdalena Birowska
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura St. 5, 02-093 Warsaw, Poland
| | - Markus Morgenstern
- II. Institute of Physics B and JARA-FIT, RWTH-Aachen University, 52074 Aachen, Germany
| |
Collapse
|
6
|
Yan S, Du Y, Zhang X, Wan X, Wang D. First-principles study of magnetic interactions and excitations in antiferromagnetic van der Waals material MPX 3(M=Mn, Fe, Co, Ni; X=S, Se). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:065502. [PMID: 37879344 DOI: 10.1088/1361-648x/ad06ef] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
Transition metal phosphorus trichalcogenides MPX3(M = Mn, Fe, Co, Ni; X = S, Se), as layered van der Waals antiferromagnetic (AFM) materials, have emerged as a promising platform for exploring two-dimensional (2D) magnetism. Based on density functional theory, we present a comprehensive investigation of the electronic and magnetic properties of MPX3. We calculated the spin exchange interactions as well as magnetocrystalline anisotropy energy. The numerical results reveal thatJ3is AFM in all cases, andJ2is significantly smaller compared to bothJ3andJ1. This behavior can be understood with regard to exchange paths and electron filling. Compared to other materials within this family, FePS3and CoPS3demonstrate significant easy-axis anisotropy. Using the obtained parameters, we estimated the Néel temperatureTNand Curie-Weiss temperatureθCW, and the results are in good agreement with the experimental observations. We further calculated the magnon spectra and successfully reproduce several typical features observed experimentally. Finally, we give helpful suggestions for the strong constraints about the range of non-negligible magnetic interactions based on the relations between magnon eigenvalues at high-symmetrykpoints in honeycomb lattices.
Collapse
Affiliation(s)
- Songsong Yan
- National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
- International Quantum Academy, Shenzhen 518048, People's Republic of China
| | - Yongping Du
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Xiaoou Zhang
- Department of Quality Education, Nanjing Vocational College of Information Technology, Nanjing 210023, People's Republic of China
| | - Xiangang Wan
- National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Di Wang
- National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| |
Collapse
|
7
|
Liu S, Malik IA, Zhang VL, Yu T. Lightning the Spin: Harnessing the Potential of 2D Magnets in Opto-Spintronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2306920. [PMID: 37905890 DOI: 10.1002/adma.202306920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/20/2023] [Indexed: 11/02/2023]
Abstract
Since the emergence of 2D magnets in 2017, the diversity of these materials has greatly expanded. Their 2D nature (atomic-scale thickness) endows these magnets with strong magnetic anisotropy, layer-dependent and switchable magnetic order, and quantum-confined quasiparticles, which distinguish them from conventional 3D magnetic materials. Moreover, the 2D geometry facilitates light incidence for opto-spintronic applications and potential on-chip integration. In analogy to optoelectronics based on optical-electronic interactions, opto-spintronics use light-spin interactions to process spin information stored in the solid state. In this review, opto-spintronics is divided into three types with respect to the wavelengths of radiation interacting with 2D magnets: 1) GHz (microwave) to THz (mid-infrared), 2) visible, and 3) UV to X-rays. It is focused on the recent research advancements on the newly discovered mechanisms of light-spin interactions in 2D magnets and introduces the potential design of novel opto-spintronic applications based on these interactions.
Collapse
Affiliation(s)
- Sheng Liu
- School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | | | - Vanessa Li Zhang
- School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Ting Yu
- School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| |
Collapse
|
8
|
Bao S, Gu ZL, Shangguan Y, Huang Z, Liao J, Zhao X, Zhang B, Dong ZY, Wang W, Kajimoto R, Nakamura M, Fennell T, Yu SL, Li JX, Wen J. Direct observation of topological magnon polarons in a multiferroic material. Nat Commun 2023; 14:6093. [PMID: 37773159 PMCID: PMC10541872 DOI: 10.1038/s41467-023-41791-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 09/19/2023] [Indexed: 10/01/2023] Open
Abstract
Magnon polarons are novel elementary excitations possessing hybrid magnonic and phononic signatures, and are responsible for many exotic spintronic and magnonic phenomena. Despite long-term sustained experimental efforts in chasing for magnon polarons, direct spectroscopic evidence of their existence is hardly observed. Here, we report the direct observation of magnon polarons using neutron spectroscopy on a multiferroic Fe2Mo3O8 possessing strong magnon-phonon coupling. Specifically, below the magnetic ordering temperature, a gap opens at the nominal intersection of the original magnon and phonon bands, leading to two separated magnon-polaron bands. Each of the bands undergoes mixing, interconverting and reversing between its magnonic and phononic components. We attribute the formation of magnon polarons to the strong magnon-phonon coupling induced by Dzyaloshinskii-Moriya interaction. Intriguingly, we find that the band-inverted magnon polarons are topologically nontrivial. These results uncover exotic elementary excitations arising from the magnon-phonon coupling, and offer a new route to topological states by considering hybridizations between different types of fundamental excitations.
Collapse
Affiliation(s)
- Song Bao
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Zhao-Long Gu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Yanyan Shangguan
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Zhentao Huang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Junbo Liao
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Xiaoxue Zhao
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Bo Zhang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Zhao-Yang Dong
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Wei Wang
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Ryoichi Kajimoto
- J-PARC Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, 319-1195, Japan
| | - Mitsutaka Nakamura
- J-PARC Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, 319-1195, Japan
| | - Tom Fennell
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute (PSI), CH-5232, Villigen, Switzerland
| | - Shun-Li Yu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - Jian-Xin Li
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - Jinsheng Wen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| |
Collapse
|
9
|
Wang K, Ren K, Hou Y, Cheng Y, Zhang G. Magnon-phonon coupling: from fundamental physics to applications. Phys Chem Chem Phys 2023; 25:21802-21815. [PMID: 37581291 DOI: 10.1039/d3cp02683c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
In recent decades, there are immense applications for bulk and few-layer magnetic insulators in biomedicine, data storage, and signal transfer. In these applications, the interaction between spin and lattice vibration has significant impacts on the device performance. In this article, we systematically review the fundamental physical aspects of magnon-phonon coupling in magnetic insulators. We first introduce the fundamental physics of magnons and magnon-phonon coupling in magnetic insulators and then discuss the influence of magnon-phonon coupling on the properties of magnons and phonons. Finally, a summary is presented, and we also discuss the possible open problems in this field. This article presents the advanced understanding of magnon-phonon coupling in magnetic insulators, which provides new opportunities for improving various possible applications.
Collapse
Affiliation(s)
- Ke Wang
- School of Automation, Xi'an University of Posts and Telecommunications, Shaanxi, 710121, China
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, PR China.
| | - Kai Ren
- School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210042, China
| | - Yinlong Hou
- School of Automation, Xi'an University of Posts and Telecommunications, Shaanxi, 710121, China
| | - Yuan Cheng
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, PR China.
- Department of Materials Science and Engineering, Monash University, VIC 3800, Australia
| | - Gang Zhang
- Institute of High Performance Computing, A*STAR, 138632, Singapore.
| |
Collapse
|
10
|
Liu S, Long M, Wang YP. Theoretical Study on the Raman Effect Due to Magnons in Two-Dimensional Magnets. NANO LETTERS 2023; 23:7427-7433. [PMID: 37549247 DOI: 10.1021/acs.nanolett.3c01851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Raman spectroscopy is one of the most useful experimental tools for studying elementary excitations in two-dimensional (2D) materials. The Raman scattering due to phonons was widely employed for detecting structural evolutions, especially those caused by magnetic phase transitions in 2D magnets. A first-principles theory of the Raman scattering effect caused by magnons is still lacking. We theoretically study the magnon Raman effect in 2D magnet CrI3. We propose a first-principles method and have calculated the intensity of circularly polarized Raman signals due to different magnon modes in the CrI3 monolayer and bilayers. The calculated Raman intensities due to magnons in the CrI3 monolayer and the rhombohedral bilayer are consistent with the selection rule deduced from the magnon pseudoangular moment and the parity of magnon modes. We also find that the selection rule is violated in the symmetry-broken monoclinic bilayer due to interlayer coupling.
Collapse
Affiliation(s)
- Shuang Liu
- School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University, 932 South Lushan Road, Changsha 410083, People's Republic of China
| | - Mengqiu Long
- School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University, 932 South Lushan Road, Changsha 410083, People's Republic of China
| | - Yun-Peng Wang
- School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University, 932 South Lushan Road, Changsha 410083, People's Republic of China
| |
Collapse
|
11
|
Pang S, Xie Y, Shen C, Zhang J. Magnetic Field and Temperature-Dependent Brillouin Light Scattering Spectra of Magnons in Yttrium Iron Garnet. J Phys Chem Lett 2023; 14:6977-6981. [PMID: 37506385 DOI: 10.1021/acs.jpclett.3c01639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Knowledge of the magnon responses to an external magnetic field and temperature is significant for spintronics applications. Herein, exploiting Brillouin light scattering (BLS) spectroscopy, we investigate the magnetic field and temperature dependence of the magnon frequency, line width, and intensity in yttrium iron garnet (YIG). The applied magnetic field here can effectively change the magnon frequency while maintaining the lifetime of the magnon. Specifically, we determine the temperature dependence of magnon frequency and the linear relationship between magneto-optic effects-related terms (|A(+)|2/|A(-)|2) and temperature below room temperature (RT), which can serve as a temperature sensor. Our results open an avenue to sense the temperature and the external magnetic field, including the effective magnetic field induced by the magnetic proximity effect. Furthermore, our results provide a route toward designing the operating frequency and loss of the devices, facilitating future research in spin-related applications, including magnon-based logic, memory, sensing, and thermospin devices.
Collapse
Affiliation(s)
- Simin Pang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yaru Xie
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao Shen
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Zhang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
12
|
Zong A, Zhang Q, Zhou F, Su Y, Hwangbo K, Shen X, Jiang Q, Liu H, Gage TE, Walko DA, Kozina ME, Luo D, Reid AH, Yang J, Park S, Lapidus SH, Chu JH, Arslan I, Wang X, Xiao D, Xu X, Gedik N, Wen H. Spin-mediated shear oscillators in a van der Waals antiferromagnet. Nature 2023; 620:988-993. [PMID: 37532936 DOI: 10.1038/s41586-023-06279-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/02/2023] [Indexed: 08/04/2023]
Abstract
Understanding how microscopic spin configuration gives rise to exotic properties at the macroscopic length scale has long been pursued in magnetic materials1-5. One seminal example is the Einstein-de Haas effect in ferromagnets1,6,7, in which angular momentum of spins can be converted into mechanical rotation of an entire object. However, for antiferromagnets without net magnetic moment, how spin ordering couples to macroscopic movement remains elusive. Here we observed a seesaw-like rotation of reciprocal lattice peaks of an antiferromagnetic nanolayer film, whose gigahertz structural resonance exhibits more than an order-of-magnitude amplification after cooling below the Néel temperature. Using a suite of ultrafast diffraction and microscopy techniques, we directly visualize this spin-driven rotation in reciprocal space at the nanoscale. This motion corresponds to interlayer shear in real space, in which individual micro-patches of the film behave as coherent oscillators that are phase-locked and shear along the same in-plane axis. Using time-resolved optical polarimetry, we further show that the enhanced mechanical response strongly correlates with ultrafast demagnetization, which releases elastic energy stored in local strain gradients to drive the oscillators. Our work not only offers the first microscopic view of spin-mediated mechanical motion of an antiferromagnet but it also identifies a new route towards realizing high-frequency resonators8,9 up to the millimetre band, so the capability of controlling magnetic states on the ultrafast timescale10-13 can be readily transferred to engineering the mechanical properties of nanodevices.
Collapse
Affiliation(s)
- Alfred Zong
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Qi Zhang
- Department of Physics, University of Washington, Seattle, WA, USA
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
- Department of Physics, Nanjing University, Nanjing, China
| | - Faran Zhou
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Yifan Su
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kyle Hwangbo
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Xiaozhe Shen
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Qianni Jiang
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Haihua Liu
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Thomas E Gage
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Donald A Walko
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | | | - Duan Luo
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | | | - Jie Yang
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Suji Park
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA
| | - Saul H Lapidus
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Ilke Arslan
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Xijie Wang
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Di Xiao
- Department of Physics, University of Washington, Seattle, WA, USA
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Xiaodong Xu
- Department of Physics, University of Washington, Seattle, WA, USA.
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA.
| | - Nuh Gedik
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Haidan Wen
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA.
- Materials Science Division, Argonne National Laboratory, Lemont, IL, USA.
| |
Collapse
|
13
|
Cui J, Boström EV, Ozerov M, Wu F, Jiang Q, Chu JH, Li C, Liu F, Xu X, Rubio A, Zhang Q. Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet. Nat Commun 2023; 14:3396. [PMID: 37296106 DOI: 10.1038/s41467-023-39123-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
Two-dimensional (2D) magnetic systems possess versatile magnetic order and can host tunable magnons carrying spin angular momenta. Recent advances show angular momentum can also be carried by lattice vibrations in the form of chiral phonons. However, the interplay between magnons and chiral phonons as well as the details of chiral phonon formation in a magnetic system are yet to be explored. Here, we report the observation of magnon-induced chiral phonons and chirality selective magnon-phonon hybridization in a layered zigzag antiferromagnet (AFM) FePSe3. With a combination of magneto-infrared and magneto-Raman spectroscopy, we observe chiral magnon polarons (chiMP), the new hybridized quasiparticles, at zero magnetic field. The hybridization gap reaches 0.25 meV and survives down to the quadrilayer limit. Via first principle calculations, we uncover a coherent coupling between AFM magnons and chiral phonons with parallel angular momenta, which arises from the underlying phonon and space group symmetries. This coupling lifts the chiral phonon degeneracy and gives rise to an unusual Raman circular polarization of the chiMP branches. The observation of coherent chiral spin-lattice excitations at zero magnetic field paves the way for angular momentum-based hybrid phononic and magnonic devices.
Collapse
Affiliation(s)
- Jun Cui
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, China
| | - Emil Viñas Boström
- Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Mykhaylo Ozerov
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA.
| | - Fangliang Wu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, China
| | - Qianni Jiang
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
| | - Changcun Li
- School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, China
| | - Fucai Liu
- School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, China
| | - Xiaodong Xu
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Angel Rubio
- Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany.
- Center for Computational Quantum Physics, The Flatiron Institute, New York, NY, 10010, USA.
| | - Qi Zhang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, China.
| |
Collapse
|
14
|
Luo J, Li S, Ye Z, Xu R, Yan H, Zhang J, Ye G, Chen L, Hu D, Teng X, Smith WA, Yakobson BI, Dai P, Nevidomskyy AH, He R, Zhu H. Evidence for Topological Magnon-Phonon Hybridization in a 2D Antiferromagnet down to the Monolayer Limit. NANO LETTERS 2023; 23:2023-2030. [PMID: 36797055 DOI: 10.1021/acs.nanolett.3c00351] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Topological phonons and magnons potentially enable low-loss, quantum coherent, and chiral transport of information and energy at the atomic scale. Van der Waals magnetic materials are promising to realize such states due to their recently discovered strong interactions among the electronic, spin, and lattice degrees of freedom. Here, we report the first observation of coherent hybridization of magnons and phonons in monolayer antiferromagnet FePSe3 by cavity-enhanced magneto-Raman spectroscopy. The robust magnon-phonon cooperativity in the 2D limit occurs even in zero magnetic field, which enables nontrivial band inversion between longitudinal and transverse optical phonons caused by the strong coupling with magnons. The spin and lattice symmetry theoretically guarantee magnetic-field-controlled topological phase transition, verified by nonzero Chern numbers calculated from the coupled spin-lattice model. The 2D topological magnon-phonon hybridization potentially offers a new route toward quantum phononics and magnonics with an ultrasmall footprint.
Collapse
Affiliation(s)
- Jiaming Luo
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
- Applied Physics Graduate Program, Rice University, Houston, Texas 77005, United States
| | - Shuyi Li
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Zhipeng Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Rui Xu
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Han Yan
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Junjie Zhang
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Gaihua Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Lebing Chen
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Ding Hu
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Xiaokun Teng
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - William A Smith
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Boris I Yakobson
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Pengcheng Dai
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Andriy H Nevidomskyy
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Rui He
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Hanyu Zhu
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| |
Collapse
|
15
|
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. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208355. [PMID: 36437480 DOI: 10.1002/adma.202208355] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [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.
Collapse
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
| |
Collapse
|
16
|
Diederich GM, Cenker J, Ren Y, Fonseca J, Chica DG, Bae YJ, Zhu X, Roy X, Cao T, Xiao D, Xu X. Tunable interaction between excitons and hybridized magnons in a layered semiconductor. NATURE NANOTECHNOLOGY 2023; 18:23-28. [PMID: 36577852 DOI: 10.1038/s41565-022-01259-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 10/10/2022] [Indexed: 06/17/2023]
Abstract
The interaction between distinct excitations in solids is of both fundamental interest and technological importance. One such interaction is the coupling between an exciton, a Coulomb bound electron-hole pair, and a magnon, a collective spin excitation. The recent emergence of van der Waals magnetic semiconductors1 provides a platform to explore these exciton-magnon interactions and their fundamental properties, such as strong correlation2, as well as their photospintronic and quantum transduction3 applications. Here we demonstrate the precise control of coherent exciton-magnon interactions in the layered magnetic semiconductor CrSBr. We varied the direction of an applied magnetic field relative to the crystal axes, and thus the rotational symmetry of the magnetic system4. Thereby, we tuned not only the exciton coupling to the bright magnon, but also to an optically dark mode via magnon-magnon hybridization. We further modulated the exciton-magnon coupling and the associated magnon dispersion curves through the application of uniaxial strain. At a critical strain, a dispersionless dark magnon band emerged. Our results demonstrate an unprecedented level of control of the opto-mechanical-magnonic coupling, and a step towards the predictable and controllable implementation of hybrid quantum magnonics5-11.
Collapse
Affiliation(s)
- Geoffrey M Diederich
- Intelligence Community Postdoctoral Research Fellowship Program, University of Washington, Seattle, WA, USA
- Department of Physics, University of Washington, Seattle, WA, USA
| | - John Cenker
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Yafei Ren
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
| | - Jordan Fonseca
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Daniel G Chica
- Department of Chemistry, Columbia University, New York, NY, USA
| | - Youn Jue Bae
- Department of Chemistry, Columbia University, New York, NY, USA
| | - Xiaoyang Zhu
- Department of Chemistry, Columbia University, New York, NY, USA
| | - Xavier Roy
- Department of Chemistry, Columbia University, New York, NY, USA
| | - Ting Cao
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
| | - Di Xiao
- Department of Physics, University of Washington, Seattle, WA, USA.
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA.
| | - Xiaodong Xu
- Department of Physics, University of Washington, Seattle, WA, USA.
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA.
| |
Collapse
|
17
|
Wyzula J, Mohelský I, Václavková D, Kapuscinski P, Veis M, Faugeras C, Potemski M, Zhitomirsky ME, Orlita M. High-Angular Momentum Excitations in Collinear Antiferromagnet FePS 3. NANO LETTERS 2022; 22:9741-9747. [PMID: 36458929 DOI: 10.1021/acs.nanolett.2c04111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS3. Our measurements reveal an excitation that closely resembles the antiferromagnetic resonance mode typical of easy-axis antiferromagnets; nevertheless, it displays an unusual, four-times larger Zeeman splitting in an applied magnetic field. We identify this excitation with an |Sz| = 4 multipolar magnon─a single-ion 4-magnon bound state─that corresponds to a full reversal of a single magnetic moment of the Fe2+ ion. We argue that condensation of multipolar magnons in large-spin materials with a strong magnetic anisotropy can produce new exotic states.
Collapse
Affiliation(s)
- Jan Wyzula
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
- Department of Physics, University of Fribourg, Chemin du Musée 3, CH-1700Fribourg, Switzerland
| | - Ivan Mohelský
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
| | - Diana Václavková
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
| | - Piotr Kapuscinski
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
| | - Martin Veis
- Institute of Physics, Charles University, Ke Karlovu 5, Prague, CZ-121 16, Czech Republic
| | - Clément Faugeras
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
| | - Marek Potemski
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
- CENTERA Laboratories, Institute of High Pressure Physics, PAS, PL-01-142Warsaw, Poland
| | - Mike E Zhitomirsky
- Univ. Grenoble Alpes, CEA, IRIG, PHELIQS, 17 avenue des Martyrs, F-38000Grenoble, France
| | - Milan Orlita
- Laboratoire National des Champs Magnétiques Intenses, CNRS UPR3228, EMFL, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA-T, Grenoble and Toulouse, F-38042, France
- Institute of Physics, Charles University, Ke Karlovu 5, Prague, CZ-121 16, Czech Republic
| |
Collapse
|
18
|
Zhou F, Hwangbo K, Zhang Q, Wang C, Shen L, Zhang J, Jiang Q, Zong A, Su Y, Zajac M, Ahn Y, Walko DA, Schaller RD, Chu JH, Gedik N, Xu X, Xiao D, Wen H. Dynamical criticality of spin-shear coupling in van der Waals antiferromagnets. Nat Commun 2022; 13:6598. [PMID: 36329063 PMCID: PMC9633802 DOI: 10.1038/s41467-022-34376-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Abstract
The interplay between a multitude of electronic, spin, and lattice degrees of freedom underlies the complex phase diagrams of quantum materials. Layer stacking in van der Waals (vdW) heterostructures is responsible for exotic electronic and magnetic properties, which inspires stacking control of two-dimensional magnetism. Beyond the interplay between stacking order and interlayer magnetism, we discover a spin-shear coupling mechanism in which a subtle shear of the atomic layers can have a profound effect on the intralayer magnetic order in a family of vdW antiferromagnets. Using time-resolved X-ray diffraction and optical linear dichroism measurements, interlayer shear is identified as the primary structural degree of freedom that couples with magnetic order. The recovery times of both shear and magnetic order upon optical excitation diverge at the magnetic ordering temperature with the same critical exponent. The time-dependent Ginzburg-Landau theory shows that this concurrent critical slowing down arises from a linear coupling of the interlayer shear to the magnetic order, which is dictated by the broken mirror symmetry intrinsic to the monoclinic stacking. Our results highlight the importance of interlayer shear in ultrafast control of magnetic order via spin-mechanical coupling. Van der Waals materials are characterized by two dimensional layers weakly held together by interlayer van der Waals forces. Here, the authors study how shear motions between these layers influence the magnetic properties of the van der Waals antiferromagnets FePS3, MnPS3, and NiPS3. ‘
Collapse
Affiliation(s)
- Faran Zhou
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Kyle Hwangbo
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Qi Zhang
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA.,Department of Physics, University of Washington, Seattle, WA, USA.,Department of Physics, Nanjing University, Nanjing, China
| | - Chong Wang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
| | - Lingnan Shen
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Jiawei Zhang
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Qianni Jiang
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Alfred Zong
- Department of Chemistry, University of California Berkeley, Berkeley, CA, USA
| | - Yifan Su
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Marc Zajac
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Youngjun Ahn
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA.,Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Donald A Walko
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, WA, USA
| | - Nuh Gedik
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Xiaodong Xu
- Department of Physics, University of Washington, Seattle, WA, USA.,Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
| | - Di Xiao
- Department of Physics, University of Washington, Seattle, WA, USA.,Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA
| | - Haidan Wen
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA. .,Materials Science Division, Argonne National Laboratory, Lemont, IL, USA.
| |
Collapse
|
19
|
Dirnberger F, Bushati R, Datta B, Kumar A, MacDonald AH, Baldini E, Menon VM. Spin-correlated exciton-polaritons in a van der Waals magnet. NATURE NANOTECHNOLOGY 2022; 17:1060-1064. [PMID: 36097046 DOI: 10.1038/s41565-022-01204-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Strong coupling between light and elementary excitations is emerging as a powerful tool to engineer the properties of solid-state systems. Spin-correlated excitations that couple strongly to optical cavities promise control over collective quantum phenomena such as magnetic phase transitions, but their suitable electronic resonances are yet to be found. Here, we report strong light-matter coupling in NiPS3, a van der Waals antiferromagnet with highly correlated electronic degrees of freedom. A previously unobserved class of polaritonic quasiparticles emerges from the strong coupling between its spin-correlated excitons and the photons inside a microcavity. Detailed spectroscopic analysis in conjunction with a microscopic theory provides unique insights into the origin and interactions of these exotic magnetically coupled excitations. Our work introduces van der Waals magnets to the field of strong light-matter physics and provides a path towards the design and control of correlated electron systems via cavity quantum electrodynamics.
Collapse
Affiliation(s)
| | - Rezlind Bushati
- Department of Physics, City College of New York, New York, NY, USA
- Department of Physics, The Graduate Center, City University of New York, New York, NY, USA
| | - Biswajit Datta
- Department of Physics, City College of New York, New York, NY, USA
| | - Ajesh Kumar
- Department of Physics, University of Texas at Austin, Austin, TX, USA
| | - Allan H MacDonald
- Department of Physics, University of Texas at Austin, Austin, TX, USA
| | - Edoardo Baldini
- Department of Physics, University of Texas at Austin, Austin, TX, USA.
| | - Vinod M Menon
- Department of Physics, City College of New York, New York, NY, USA.
- Department of Physics, The Graduate Center, City University of New York, New York, NY, USA.
| |
Collapse
|
20
|
Yin T, You JY, Huang Y, Thu Do HT, Prosnikov MA, Zhao W, Serra M, Christianen PCM, Sofer Z, Sun H, Feng YP, Xiong Q. Signature of Ultrafast Formation and Annihilation of Polaronic States in a Layered Ferromagnet. NANO LETTERS 2022; 22:7784-7790. [PMID: 36150019 DOI: 10.1021/acs.nanolett.2c01771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The strong interaction between charge and lattice vibration gives rise to a polaron, which has a profound effect on optical and transport properties of matters. In magnetic materials, polarons are involved in spin dependent transport, which can be potentially tailored for spintronic and opto-spintronic device applications. Here, we identify the signature of ultrafast formation of polaronic states in CrBr3. The polaronic states are long-lived, having a lifetime on the time scale of nanoseconds to microseconds, which coincides with the emission lifetime of ∼4.3 μs. Transition of the polaronic states is strongly screened by the phonon, generating a redshift of the transition energy ∼0.2 eV. Moreover, energy-dependent localization of polaronic states is discovered followed by transport/annihilation properties. These results shed light on the nature of the polarons and their formation and transport dynamics in layered magnetic materials, which paves the way for the rational design of two-dimensional magnetic devices.
Collapse
Affiliation(s)
- Tingting Yin
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore637371, Singapore
| | - Jing-Yang You
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore117551, Singapore
| | - Yuqing Huang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore637371, Singapore
| | - Ha Thi Thu Do
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore637371, Singapore
| | - Mikail A Prosnikov
- High Field Magnet Laboratory, HFML-EMFL, Radboud University, 6525 EDNijmegen, The Netherlands
| | - Weijie Zhao
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Southeast University, Nanjing211189, P.R. China
| | - Marco Serra
- University of Chemistry and Technology Prague, Technicka 5, Prague16628, Czech Republic
| | - Peter C M Christianen
- High Field Magnet Laboratory, HFML-EMFL, Radboud University, 6525 EDNijmegen, The Netherlands
| | - Zdenek Sofer
- University of Chemistry and Technology Prague, Technicka 5, Prague16628, Czech Republic
| | - Handong Sun
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore637371, Singapore
| | - Yuan Ping Feng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore117551, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore117546, Singapore
| | - Qihua Xiong
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing100084, P.R. China
- Frontier Science Center for Quantum Information, Beijing100084, P.R. China
- Collaborative Innovation Center of Quantum Matter, Beijing100084, P.R. China
- Beijing Academy of Quantum Information Sciences, Beijing100193, P.R. China
| |
Collapse
|
21
|
Pawbake A, Pelini T, Delhomme A, Romanin D, Vaclavkova D, Martinez G, Calandra M, Measson MA, Veis M, Potemski M, Orlita M, Faugeras C. High-Pressure Tuning of Magnon-Polarons in the Layered Antiferromagnet FePS 3. ACS NANO 2022; 16:12656-12665. [PMID: 35867668 DOI: 10.1021/acsnano.2c04286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Magnetic layered materials have emerged recently as promising systems to introduce magnetism in structures based on two-dimensional (2D) materials and to investigate exotic magnetic ground states in the 2D limit. In this work, we apply high hydrostatic pressures up to P ≈ 8.7 GPa to the bulk layered antiferromagnet FePS3 to tune the collective lattice excitations (phonons) in resonance with magnetic excitations (magnons). Close to P = 4 GPa, the magnon-phonon resonance is achieved, and the strong coupling between these collective modes leads to the formation of new quasiparticles, the magnon-polarons, evidenced in our low-temperature Raman scattering experiments by a particular avoided crossing behavior between the phonon and the doubly degenerate antiferromagnetic magnon. At the pressure-induced magnon-phonon resonance, three distinct coupled modes emerge. As it is mainly defined by intralayer properties, we show that the energy of the magnon is nearly pressure-independent. We additionally apply high magnetic fields up to B = 30 T to fully identify and characterize the magnon excitations and to explore the different magnon-polaron regimes for which the phonon has an energy lower than, equal to, or higher than the magnon energy. The description of our experimental data requires introducing a phonon-phonon coupling not taken into account in actual calculations.
Collapse
Affiliation(s)
- Amit Pawbake
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Thomas Pelini
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Alex Delhomme
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Davide Romanin
- Sorbonne Université, CNRS, Institut des Nanosciences de Paris, UMR 7588, F-75252 Paris, France
| | - Diana Vaclavkova
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Gerard Martinez
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Matteo Calandra
- Sorbonne Université, CNRS, Institut des Nanosciences de Paris, UMR 7588, F-75252 Paris, France
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, 38123 Povo, Italy
| | | | - Martin Veis
- Faculty of Mathematics and Physics, Institute of Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
| | - Marek Potemski
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
- CENTERA Labs, Institute of High Pressure Physics, PAS, 01-142 Warsaw, Poland
| | - Milan Orlita
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - Clement Faugeras
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| |
Collapse
|
22
|
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 APPLIED MATERIALS & 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] [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.
Collapse
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
| |
Collapse
|
23
|
Sun YJ, Lai JM, Pang SM, Liu XL, Tan PH, Zhang J. Magneto-Raman Study of Magnon-Phonon Coupling in Two-Dimensional Ising Antiferromagnetic FePS 3. J Phys Chem Lett 2022; 13:1533-1539. [PMID: 35133164 DOI: 10.1021/acs.jpclett.2c00023] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Recently, the coupling between magnons (quanta of spin waves) and phonons (quanta of lattice vibrations) in two-dimensional (2D) antiferromagnet FePS3 offers a myriad of applications ranging from spintronic devices to quantum information technologies. However, the reported magnon-phonon coupling in the FePS3 flake using Raman measurements requires an ultrahigh magnetic field up to 30 T. Here, we investigate the magnon-phonon coupling in FePS3 by near-resonant magneto-Raman spectroscopy under a relatively small magnetic field (|H0| ≤ 9 T). Under near-resonant excitation, we find more pronounced coupling effects that are absent in non-resonant excitation: three optical phonons sensitive to the applied magnetic field are resolved, two of which show a frequency anti-crossing coupling with magnon, while the other coupled phonon exhibits only a polarization-coupled character without frequency anti-crossing. Besides, our polarized Raman results also show the polarization transferring between coupled magnon-phonon modes. On the basis of a modified theoretical model, we can well explain the measured Raman spectra.
Collapse
Affiliation(s)
- Yu-Jia Sun
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jia-Min Lai
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Si-Min Pang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xue-Lu Liu
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
| | - Ping-Heng Tan
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jun Zhang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| |
Collapse
|
24
|
Ergeçen E, Ilyas B, Mao D, Po HC, Yilmaz MB, Kim J, Park JG, Senthil T, Gedik N. Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet. Nat Commun 2022; 13:98. [PMID: 35013277 PMCID: PMC8748959 DOI: 10.1038/s41467-021-27741-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 12/08/2021] [Indexed: 11/27/2022] Open
Abstract
In van der Waals (vdW) materials, strong coupling between different degrees of freedom can hybridize elementary excitations into bound states with mixed character1–3. Correctly identifying the nature and composition of these bound states is key to understanding their ground state properties and excitation spectra4,5. Here, we use ultrafast spectroscopy to reveal bound states of d-orbitals and phonons in 2D vdW antiferromagnet NiPS3. These bound states manifest themselves through equally spaced phonon replicas in frequency domain. These states are optically dark above the Néel temperature and become accessible with magnetic order. By launching this phonon and spectrally tracking its amplitude, we establish the electronic origin of bound states as localized d–d excitations. Our data directly yield electron-phonon coupling strength which exceeds the highest known value in 2D systems6. These results demonstrate NiPS3 as a platform to study strong interactions between spins, orbitals and lattice, and open pathways to coherent control of 2D magnets. Van der Waals materials can exhibit strong coupling between the lattice and other degrees of freedom. Here, Ergeçen et al reveal the presence of bound states emerging from the strong interaction between the lattice vibrations and d-orbitals in the van der Waals antiferromagnet NiPS3.
Collapse
Affiliation(s)
- Emre Ergeçen
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA
| | - Batyr Ilyas
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA
| | - Dan Mao
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA
| | - Hoi Chun Po
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA.,Department of Physics, Hong Kong Univesity of Science and Technology, Clear Water Bay, Hong Kong, 999077, China
| | - Mehmet Burak Yilmaz
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA
| | - Junghyun Kim
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea.,Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Je-Geun Park
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea.,Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - T Senthil
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA
| | - Nuh Gedik
- Department of Physics, Massachusetts Institute of Technology, Cambridge, 02139, MA, USA.
| |
Collapse
|
25
|
Breslavetz I, Delhomme A, Pelini T, Pawbake A, Vaclavkova D, Orlita M, Potemski M, Measson MA, Faugeras C. Spatially resolved optical spectroscopy in extreme environment of low temperature, high magnetic fields and high pressure. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:123909. [PMID: 34972398 DOI: 10.1063/5.0070934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
We present an experimental setup developed to perform optical spectroscopy experiments (Raman scattering and photoluminescence measurements) with a micrometer spatial resolution in an extreme environment of low temperature, high magnetic field, and high pressure. This unique experimental setup, to the best of our knowledge, allows us to deeply explore the phase diagram of condensed matter systems by independently tuning these three thermodynamic parameters while monitoring the low-energy excitations (electronic, phononic, or magnetic excitations) to spatially map the Raman scattering response or to investigate objects with low dimensions. We apply this technique to bulk FePS3, a layered antiferromagnet with a Néel temperature of T ≈ 120 K.
Collapse
Affiliation(s)
- I Breslavetz
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - A Delhomme
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - T Pelini
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - A Pawbake
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - D Vaclavkova
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - M Orlita
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - M Potemski
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| | - M-A Measson
- Institut Neel, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | - C Faugeras
- LNCMI, UPR 3228, CNRS, EMFL, Université Grenoble Alpes, 38000 Grenoble, France
| |
Collapse
|