1
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Song F, Lv Y, Sun YJ, Pang S, Chang H, Guan S, Lai JM, Wang XJ, Wu B, Hu C, Yuan Z, Zhang J. Manipulation of anisotropic Zhang-Rice exciton in NiPS 3 by magnetic field. Nat Commun 2024; 15:7841. [PMID: 39244589 PMCID: PMC11380663 DOI: 10.1038/s41467-024-52220-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/29/2024] [Indexed: 09/09/2024] Open
Abstract
The effect of external magnetic fields on the behavior of the Zhang-Rice exciton in NiPS3, which captures the physics of spin-orbital entanglement in 2D XY-type antiferromagnets, remains unclear. This study presents systematic study of angle-resolved and polarization-resolved magneto-optical photoluminescence spectra of NiPS3 in the Voigt geometry. We observed highly anisotropic, non-linear Zeeman splitting and polarization rotation of the Zhang-Rice exciton, which depends on the direction and intensity of the magnetic field and can be attributed to the spin-orbital coupling and field-induced spin reorientation. Furthermore, above the critical magnetic field, we detected additional splitting of the exciton peaks, indicating the coexistence of various orientations of Néel vector. This study characterizes orbital change of Zhang-Rice exciton and field-induced spin-reorientation phase transitions in a 2D hexagonal XY-type antiferromagnet, and it further demonstrates the continuous manipulation of the spin and polarization of the Zhang-Rice exciton.
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Affiliation(s)
- Feilong Song
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
| | - Yanpei Lv
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Yu-Jia Sun
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Simin Pang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Haonan Chang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Shan Guan
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
| | - Jia-Min Lai
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Xu-Jie Wang
- Beijing Academy of Quantum Information Science, Beijing, China
| | - Bang Wu
- Beijing Academy of Quantum Information Science, Beijing, China
| | - Chengyong Hu
- Beijing Academy of Quantum Information Science, Beijing, China
| | - Zhiliang Yuan
- Beijing Academy of Quantum Information Science, Beijing, China
| | - Jun Zhang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.
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2
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Basnet R, Hu J. Understanding and tuning magnetism in van der Waals-type metal thiophosphates. NANOSCALE 2024; 16:15851-15883. [PMID: 39129678 DOI: 10.1039/d4nr01577k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Over the past two decades, significant progress in two-dimensional (2D) materials has invigorated research in condensed matter and material physics in low dimensions. While traditionally studied in three-dimensional systems, magnetism has now been extended to the 2D realm. Recent breakthroughs in 2D magnetism have attracted substantial interest from the scientific community, owing to the stable magnetic order achievable in atomically thin layers of the van der Waals (vdW)-type layered magnetic materials. These advances offer an exciting platform for investigating related phenomena in low dimensions and hold promise for spintronic applications. Consequently, vdW magnetic materials with tunable magnetism have attracted significant attention. Specifically, antiferromagnetic metal thiophosphates MPX3 (M = transition metal, P = phosphorus, X = chalcogen) have been investigated extensively. These materials exhibit long-range magnetic order spanning from bulk to the 2D limit. The magnetism in MPX3 arises from localized moments associated with transition metal ions, making it tunable via substitutions and intercalations. In this review, we focus on such tuning by providing a comprehensive summary of various metal- and chalcogen-substitution and intercalation studies, along with the mechanism of magnetism modulation, and a perspective on the development of this emergent material family.
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Affiliation(s)
- Rabindra Basnet
- Department of Chemistry & Physics, University of Arkansas at Pine Bluff, Pine Bluff, AR, 71603 USA.
| | - Jin Hu
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
- Materials Science and Engineering Program, Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA.
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3
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Yue L, Liu C, Han S, Hong H, Wang Y, Liu Q, Qi J, Li Y, Wu D, Liu K, Wang E, Dong T, Wang N. Giant nonlinear optical wave mixing in a van der Waals correlated insulator. SCIENCE ADVANCES 2024; 10:eadn6216. [PMID: 39093978 PMCID: PMC11296339 DOI: 10.1126/sciadv.adn6216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 06/28/2024] [Indexed: 08/04/2024]
Abstract
Optical nonlinearities are one of the most fascinating properties of two-dimensional (2D) materials. While tremendous efforts have been made to find and optimize the second-order optical nonlinearity in enormous 2D materials, opportunities to explore higher-order ones are elusive because of the much lower efficiency. Here, we report the giant high odd-order optical nonlinearities in centrosymmetric correlated van der Waals insulator manganese phosphorus triselenide. When illuminated by two near-infrared femtosecond lasers, the sample generates a series of profound four- and six-wave mixing outputs. The near-infrared third-order nonlinear susceptibility reaches near the highest record values of 2D materials. Comparative measurements to other prototypical nonlinear optical materials [lithium niobate, gallium(II) selenide, and tungsten disulfide] reveal its extraordinary wave mixing efficiency. The wave mixing processes are further used for nonlinear optical waveguide with multicolor emission. Our work highlights the promising prospect for future research of the nonlinear light-matter interactions in the correlated 2D system and for potential nonlinear photonic applications.
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Affiliation(s)
- Li Yue
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Chang Liu
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Shanshan Han
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
- School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, Collaborative Innovation Center ofChemical Science and Engineering, Nankai University, Tianjin 300350, China
| | - Hao Hong
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
| | - Yijun Wang
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
| | - Qiaomei Liu
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Jiajie Qi
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
| | - Yuan Li
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - Dong Wu
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Kaihui Liu
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
| | - Enge Wang
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
| | - Tao Dong
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Nanlin Wang
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
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4
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Tan Q, Occhialini CA, Gao H, Li J, Kitadai H, Comin R, Ling X. Observation of Three-State Nematicity and Domain Evolution in Atomically Thin Antiferromagnetic NiPS 3. NANO LETTERS 2024. [PMID: 38856662 DOI: 10.1021/acs.nanolett.4c00772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Nickel phosphorus trisulfide (NiPS3), a van der Waals 2D antiferromagnet, has received significant interest for its intriguing properties in recent years. However, despite its fundamental importance in the physics of low-dimensional magnetism and promising potential for technological applications, the study of magnetic domains in NiPS3 down to an atomically thin state is still lacking. Here, we report the layer-dependent magnetic characteristics and magnetic domains in NiPS3 by employing linear dichroism spectroscopy, polarized microscopy, spin-correlated photoluminescence, and Raman spectroscopy. Our results reveal the existence of the paramagnetic-to-antiferromagnetic phase transition in bulk to bilayer NiPS3 and provide evidence of the role of stronger spin fluctuations in thin NiPS3. Furthermore, our study identifies three distinct antiferromagnetic domains within atomically thin NiPS3 and captures the thermally activated domain evolution. Our findings provide crucial insights for the development of antiferromagnetic spintronics and related technologies.
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Affiliation(s)
- Qishuo Tan
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Connor A Occhialini
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hongze Gao
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Jiaruo Li
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hikari Kitadai
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Riccardo Comin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Xi Ling
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
- The Photonics Center, Boston University, Boston, Massachusetts 02215, United States
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5
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Lee Y, Kim C, Son S, Cui J, Park G, Zhang KX, Oh S, Cheong H, Kleibert A, Park JG. Imaging Thermally Fluctuating Néel Vectors in van der Waals Antiferromagnet NiPS 3. NANO LETTERS 2024; 24:6043-6050. [PMID: 38717152 DOI: 10.1021/acs.nanolett.4c00804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Studying antiferromagnetic domains is essential for fundamental physics and potential spintronics applications. Despite their importance, few systematic studies have been performed on antiferromagnet (AFM) domains with high spatial resolution in van der Waals (vdW) materials, and direct probing of the Néel vectors remains challenging. In this work, we found multidomain states in the vdW AFM NiPS3, a material extensively investigated for its unique magnetic exciton. We employed photoemission electron microscopy combined with the X-ray magnetic linear dichroism (XMLD-PEEM) to image the NiPS3's magnetic structure. The nanometer-spatial resolution of XMLD-PEEM allows us to determine local Néel vector orientations and discover thermally fluctuating Néel vectors that are independent of the crystal symmetry even at 65 K, well below the TN of 155 K. We demonstrate that an in-plane orbital moment of the Ni ion is responsible for the weak magnetocrystalline anisotropy. The observed thermal fluctuations of the antiferromagnetic domains may explain the broadening of magnetic exciton peaks at higher temperatures.
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Affiliation(s)
- Youjin Lee
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Chaebin Kim
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Suhan Son
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jingyuan Cui
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Giung Park
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kai-Xuan Zhang
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Siwon Oh
- Department of Physics, Sogang University, Seoul, 04107, Republic of Korea
| | - Hyeonsik Cheong
- Department of Physics, Sogang University, Seoul, 04107, Republic of Korea
| | - Armin Kleibert
- Swiss Light Source, Paul Scherrer Institut, Villigen, PSI CH-5232, Switzerland
| | - Je-Geun Park
- Center for Quantum Materials, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea
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6
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Klaproth T, Aswartham S, Shemerliuk Y, Selter S, Janson O, van den Brink J, Büchner B, Knupfer M, Pazek S, Mikhailova D, Efimenko A, Hayn R, Savoyant A, Gubanov V, Koitzsch A. Origin of the Magnetic Exciton in the van der Waals Antiferromagnet NiPS_{3}. PHYSICAL REVIEW LETTERS 2023; 131:256504. [PMID: 38181357 DOI: 10.1103/physrevlett.131.256504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/29/2023] [Accepted: 10/03/2023] [Indexed: 01/07/2024]
Abstract
An ultrasharp photoluminescence line intimately related to antiferromagnetic order has been found in NiPS_{3}, a correlated van der Waals material, opening prospects for magneto-optical coupling schemes and spintronic applications. Here we unambiguously clarify the singlet origin of this excitation, confirming its roots in the spin structure. Based on a comprehensive investigation of the electronic structure using angle-resolved photoemission and q-dependent electron energy loss spectroscopy as experimental tools we develop, in a first step, an adequate theoretical understanding using density functional theory (DFT). In a second step the DFT is used as input for a dedicated multiplet theory by which we achieve excellent agreement with available multiplet spectroscopy. Our Letter connects the understanding of the electronic structure and of optical processes in NiPS_{3} and related materials as a prerequisite for further progress of the field.
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Affiliation(s)
- T Klaproth
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - S Aswartham
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Y Shemerliuk
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - S Selter
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - O Janson
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - J van den Brink
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - B Büchner
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
- Institute of Solid State and Material Physics, Technische Universität Dresden, 01062 Dresden, Germany
| | - M Knupfer
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - S Pazek
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - D Mikhailova
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - A Efimenko
- Helmholtz-Zentrum Berlin für Materialien und Energie, Interface Design, Albert Einstein Str. 15, 12489 Berlin, Germany
- Helmholtz Zentrum Berlin für Materialien und Energie, Energy Materials In-situ Laboratory Berlin (EMIL), Albert Einstein Str. 15, 12489 Berlin, Germany
| | - R Hayn
- Aix-Marseille Université, Centre National de la Recherche Scientifique, IM2NP-UMR 7334, 13397 Marseille Cedex 20, France
| | - A Savoyant
- Aix-Marseille Université, Centre National de la Recherche Scientifique, IM2NP-UMR 7334, 13397 Marseille Cedex 20, France
| | - V Gubanov
- Aix-Marseille Université, Centre National de la Recherche Scientifique, IM2NP-UMR 7334, 13397 Marseille Cedex 20, France
| | - A Koitzsch
- Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
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7
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Houmes MJA, Baglioni G, Šiškins M, Lee M, Esteras DL, Ruiz AM, Mañas-Valero S, Boix-Constant C, Baldoví JJ, Coronado E, Blanter YM, Steeneken PG, van der Zant HSJ. Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction. Nat Commun 2023; 14:8503. [PMID: 38129381 PMCID: PMC10739885 DOI: 10.1038/s41467-023-44180-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023] Open
Abstract
The temperature dependent order parameter provides important information on the nature of magnetism. Using traditional methods to study this parameter in two-dimensional (2D) magnets remains difficult, however, particularly for insulating antiferromagnetic (AF) compounds. Here, we show that its temperature dependence in AF MPS3 (M(II) = Fe, Co, Ni) can be probed via the anisotropy in the resonance frequency of rectangular membranes, mediated by a combination of anisotropic magnetostriction and spontaneous staggered magnetization. Density functional calculations followed by a derived orbital-resolved magnetic exchange analysis confirm and unravel the microscopic origin of this magnetization-induced anisotropic strain. We further show that the temperature and thickness dependent order parameter allows to deduce the material's critical exponents characterising magnetic order. Nanomechanical sensing of magnetic order thus provides a future platform to investigate 2D magnetism down to the single-layer limit.
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Affiliation(s)
- Maurits J A Houmes
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands.
| | - Gabriele Baglioni
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Makars Šiškins
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Martin Lee
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Dorye L Esteras
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Alberto M Ruiz
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Samuel Mañas-Valero
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Jose J Baldoví
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Yaroslav M Blanter
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
| | - Peter G Steeneken
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
- Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
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8
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Wang Z, Lou H, Yan X, Liu Y, Yang G. 2D antiferromagnetic semiconducting FeCN with interesting properties. Phys Chem Chem Phys 2023; 25:32416-32420. [PMID: 38010895 DOI: 10.1039/d3cp04820a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Two-dimensional magnetic materials have demonstrated favorable properties (e.g., large spin polarization and net magnetization) for the development of next-generation spintronic devices. The discovery of such materials and insight into their magnetic coupling mechanism has become a research focus. Here, on the basis of first-principles structural search calculations, we have identified a fresh FeCN monolayer consisting of edge-sharing Fe triangle sublattices and FeC3N2 rings, which integrates antiferromagnetism, semiconductivity, and planarity. Interestingly, it possesses a large magnetic anisotropy energy (MAE) of 614 μeV per Fe atom, a narrow band gap (Eg) of 0.47 eV, a large magnetic moment of 3.15 μB, and a proper Néel temperature (TN) of 97 K. The direct exchange between the nearest-neighbor Fe atoms in the triangle sublattice is mainly responsible for the AFM ordering. Its high structural stability, stemming from the collective contribution of covalent C-C and C-N bonds, ionic Fe-N bonds, and metallic Fe-Fe bonds, provides a strong feasibility for experimental synthesis.
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Affiliation(s)
- Zhicui Wang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Huan Lou
- Department of Physics, College of Science, Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China
| | - Xu Yan
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Yong Liu
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
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9
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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.
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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
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10
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Wang Z, Lou H, Han F, Yan X, Liu Y, Yang G. An antiferromagnetic semiconducting FeCN 2 monolayer with a large magnetic anisotropy and strong magnetic coupling. Phys Chem Chem Phys 2023; 25:21521-21527. [PMID: 37545317 DOI: 10.1039/d3cp02267f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Two-dimensional antiferromagnetic (AFM) materials with an intrinsic semiconductivity, a high critical temperature, and a sizable magnetic anisotropy energy (MAE) have attracted extensive attention because they show promise for high-performance spintronic nanodevices. Here, we have identified a new FeCN2 monolayer with a unique zigzag Fe chain through first-principles swarm structural search calculations. It is an AFM semiconductor with a direct band gap of 2.04 eV, a Néel temperature (TN) of 176 K, and a large in-plane MAE of 0.50 meV per Fe atom. More interestingly, the intrinsic antiferromagnetism, contributed by the strong magnetic coupling of neighbouring Fe ions, can be maintained under the external biaxial strains. A large cohesive energy and high dynamical stability favor synthesis and application. Therefore, these fascinating properties of the FeCN2 monolayer make it a promising nanoscale spintronic material.
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Affiliation(s)
- Zhicui Wang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Huan Lou
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
- Department of Physics, College of Science, Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China
| | - Fanjunjie Han
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Xu Yan
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Yong Liu
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
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11
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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.
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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.
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12
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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.
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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.
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13
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Mertens F, Mönkebüscher D, Parlak U, Boix-Constant C, Mañas-Valero S, Matzer M, Adhikari R, Bonanni A, Coronado E, Kalashnikova AM, Bossini D, Cinchetti M. Ultrafast Coherent THz Lattice Dynamics Coupled to Spins in the van der Waals Antiferromagnet FePS 3. 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.
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Affiliation(s)
- Fabian Mertens
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - David Mönkebüscher
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Umut Parlak
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Margherita Matzer
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Rajdeep Adhikari
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Alberta Bonanni
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | | | - Davide Bossini
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457, Konstanz, Germany
| | - Mirko Cinchetti
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
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14
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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. ‘
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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.
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15
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Fishman RS, Gardner JS, Okamoto S. Orbital Angular Momentum of Magnons in Collinear Magnets. PHYSICAL REVIEW LETTERS 2022; 129:167202. [PMID: 36306774 DOI: 10.1103/physrevlett.129.167202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/28/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
We study the orbital angular momentum of magnons for collinear ferromagnet (FM) and antiferromagnetic (AF) systems with nontrivial networks of exchange interactions. The orbital angular momentum of magnons for AF and FM zigzag and honeycomb lattices becomes nonzero when the lattice contains two inequivalent sites and is largest at the avoided-crossing points or extremum of the frequency bands. Hence, the arrangement of exchange interactions may play a more important role at producing the orbital angular momentum of magnons than the spin-orbit coupling energy and the resulting noncollinear arrangement of spins.
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Affiliation(s)
- Randy S Fishman
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Jason S Gardner
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Satoshi Okamoto
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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16
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Ramos M, Marques-Moros F, Esteras DL, Mañas-Valero S, Henríquez-Guerra E, Gadea M, Baldoví JJ, Canet-Ferrer J, Coronado E, Calvo MR. Photoluminescence Enhancement by Band Alignment Engineering in MoS 2/FePS 3 van der Waals Heterostructures. ACS 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.
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Affiliation(s)
- Maria Ramos
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
| | | | - Dorye L. Esteras
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Samuel Mañas-Valero
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | | | - Marcos Gadea
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
| | - José J. Baldoví
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Josep Canet-Ferrer
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - Eugenio Coronado
- Instituto
de Ciencia Molecular (ICMol), Universitat
de València, Paterna 46980, Spain
| | - M. Reyes Calvo
- Departamento
de Física Aplicada, Universidad de
Alicante, Alicante 03690, Spain
- Instituto
Universitario de Materiales de Alicante (IUMA), Universidad de Alicante, Alicante 03690, Spain
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17
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Wagner J, Sahasrabudhe A, Versteeg R, Wang Z, Tsurkan V, Loidl A, Hedayat H, van Loosdrecht PHM. Nonequilibrium dynamics of α-RuCl 3 - a time-resolved magneto-optical spectroscopy study. Faraday Discuss 2022; 237:237-258. [PMID: 35674250 DOI: 10.1039/d2fd00006g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present time-resolved magneto-optical spectroscopy on the magnetic Mott-Hubbard-insulating Kitaev spin liquid candidate α-RuCl3 to investigate the nonequilibrium dynamics of its antiferromagnetically ordered zigzag groundstate after photoexcitation. A systematic study of the transient magnetic linear dichroism under different experimental conditions (temperature, external magnetic field, photoexcitation density) gives direct access to the dynamical interplay of charge excitations with the zigzag ordered state on ultrashort time scales. We observe a rather slow initial demagnetization (few to 10s of ps) followed by a long-lived non-thermal antiferromagnetic spin-disordered state (100-1000s of ps), which can be understood in terms of holons and doublons disordering the antiferromagnetic background after photoexcitation. Varying temperature and fluence in the presence of an external magnetic field reveals two distinct photoinduced dynamics associated with the zigzag and quantum paramagnetic disordered phases. The photo-induced non-thermal spin-disordered state shows universal compressed-exponential recovery dynamics related to the growth and propagation of zigzag domains on nanosecond time scales, which is interpreted within the framework of the Fatuzzo-Labrune model for magnetization reversal. The study of nonequilibrium states in strongly correlated materials is a relatively unexplored topic, but our results are expected to be extendable to a large class of Mott-Hubbard insulator materials with strong spin-orbit coupling.
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Affiliation(s)
- Julian Wagner
- Universität zu Köln, II. Physikalisches Institut, Zülpicher Straße 77, Köln D-50937, Germany.
| | - Anuja Sahasrabudhe
- Universität zu Köln, II. Physikalisches Institut, Zülpicher Straße 77, Köln D-50937, Germany.
| | - Rolf Versteeg
- Universität zu Köln, II. Physikalisches Institut, Zülpicher Straße 77, Köln D-50937, Germany.
| | - Zhe Wang
- Department of Physics, TU Dortmund University, Otto-Hahn-Str. 4, 44227 Dortmund, Germany
| | - Vladimir Tsurkan
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany.,Institute of Applied Physics, Chisinau, MD 2028, Republic of Moldova
| | - Alois Loidl
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - Hamoon Hedayat
- Universität zu Köln, II. Physikalisches Institut, Zülpicher Straße 77, Köln D-50937, Germany.
| | - Paul H M van Loosdrecht
- Universität zu Köln, II. Physikalisches Institut, Zülpicher Straße 77, Köln D-50937, Germany.
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18
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Ni Z, Huang N, Haglund AV, Mandrus DG, Wu L. Observation of Giant Surface Second-Harmonic Generation Coupled to Nematic Orders in the van der Waals Antiferromagnet FePS 3. NANO LETTERS 2022; 22:3283-3288. [PMID: 35413201 DOI: 10.1021/acs.nanolett.2c00212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Second-harmonic generation has been applied to study lattice, electronic, and magnetic proprieties in atomically thin materials. However, inversion symmetry breaking is usually required for the materials to generate a large signal. In this work, we report a giant second-harmonic generation that arises below the Néel temperature in few-layer centrosymmetric FePS3. A layer-dependent study indicates the detected signal is from the second-order nonlinearity of the surface. The magnetism-induced surface second-harmonic response is 2 orders of magnitude larger than those reported in other magnetic systems, with the surface nonlinear susceptibility reaching 0.08-0.13 nm2/V in 2-5 L samples. By combing linear dichroism and second-harmonic generation experiments, we further confirm the giant second-harmonic generation is coupled to nematic orders formed by the three possible Zigzag antiferromagnetic domains. Our study shows that the surface second-harmonic generation is also a sensitive tool to study antiferromagnetic states in centrosymmetric atomically thin materials.
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Affiliation(s)
- Zhuoliang Ni
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Nan Huang
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Amanda V Haglund
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - David G Mandrus
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Liang Wu
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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19
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Wang X, Cao J, Li H, Lu Z, Cohen A, Haldar A, Kitadai H, Tan Q, Burch KS, Smirnov D, Xu W, Sharifzadeh S, Liang L, Ling X. Electronic Raman scattering in the 2D antiferromagnet NiPS 3. SCIENCE ADVANCES 2022; 8:eabl7707. [PMID: 35030029 PMCID: PMC8759744 DOI: 10.1126/sciadv.abl7707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 11/22/2021] [Indexed: 05/26/2023]
Abstract
Correlated-electron systems have long been an important platform for various interesting phenomena and fundamental questions in condensed matter physics. As a pivotal process in these systems, d-d transitions have been suggested as a key factor toward realizing optical spin control in two-dimensional (2D) magnets. However, it remains unclear how d-d excitations behave in quasi-2D systems with strong electronic correlation and spin-charge coupling. Here, we present a systematic electronic Raman spectroscopy investigation on d-d transitions in a 2D antiferromagnet—NiPS3, from bulk to atomically thin samples. Two electronic Raman modes originating from the scattering of incident photons with d electrons in Ni2+ ions are observed at ~1.0 eV. This electronic process persists down to trilayer flakes and exhibits insensitivity to the spin ordering of NiPS3. Our study demonstrates the utility of electronic Raman scattering in investigating the unique electronic structure and its coupling to magnetism in correlated 2D magnets.
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Affiliation(s)
- Xingzhi Wang
- Department of Chemistry, Boston University, Boston, MA 02215, USA
| | - Jun Cao
- Department of Chemistry, Boston University, Boston, MA 02215, USA
| | - Hua Li
- Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zhengguang Lu
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA
- Department of Physics, Florida State University, Tallahassee, FL 32306, USA
| | - Arielle Cohen
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Anubhab Haldar
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Hikari Kitadai
- Department of Chemistry, Boston University, Boston, MA 02215, USA
| | - Qishuo Tan
- Department of Chemistry, Boston University, Boston, MA 02215, USA
| | - Kenneth S. Burch
- Department of Physics, Boston College, Chestnut Hill, MA 02467, USA
| | - Dmitry Smirnov
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA
| | - Weigao Xu
- Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Sahar Sharifzadeh
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
- Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215, USA
- Department of Physics, Boston University, Boston, MA 02215, USA
| | - Liangbo Liang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Xi Ling
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
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20
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Jin Y, Yan M, Kremer T, Voloshina E, Dedkov Y. Mott-Hubbard insulating state for the layered van der Waals [Formula: see text] (X: S, Se) as revealed by NEXAFS and resonant photoelectron spectroscopy. Sci Rep 2022; 12:735. [PMID: 35031642 PMCID: PMC8760309 DOI: 10.1038/s41598-021-04557-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 12/22/2021] [Indexed: 12/05/2022] Open
Abstract
A broad family of the nowadays studied low-dimensional systems, including 2D materials, demonstrate many fascinating properties, which however depend on the atomic composition as well as on the system dimensionality. Therefore, the studies of the electronic correlation effects in the new 2D materials is of paramount importance for the understanding of their transport, optical and catalytic properties. Here, by means of electron spectroscopy methods in combination with density functional theory calculations we investigate the electronic structure of a new layered van der Waals [Formula: see text] (X: S, Se) materials. Using systematic resonant photoelectron spectroscopy studies we observed strong resonant behavior for the peaks associated with the [Formula: see text] final state at low binding energies for these materials. Such observations clearly assign [Formula: see text] to the class of Mott-Hubbard type insulators for which the top of the valence band is formed by the hybrid Fe-S/Se electronic states. These observations are important for the deep understanding of this new class of materials and draw perspectives for their further applications in different application areas, like (opto)spintronics and catalysis.
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Affiliation(s)
- Yichen Jin
- Department of Physics, Shanghai University, 99 Shangda Road, Shanghai, 200444 People’s Republic of China
| | - Mouhui Yan
- Department of Physics, Shanghai University, 99 Shangda Road, Shanghai, 200444 People’s Republic of China
| | - Tomislav Kremer
- Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
| | - Elena Voloshina
- Department of Physics, Shanghai University, 99 Shangda Road, Shanghai, 200444 People’s Republic of China
- Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
- Centre of Excellence ENSEMBLE3 Sp. z o. o., Wolczynska Str. 133, 01-919 Warsaw, Poland
| | - Yuriy Dedkov
- Department of Physics, Shanghai University, 99 Shangda Road, Shanghai, 200444 People’s Republic of China
- Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
- Centre of Excellence ENSEMBLE3 Sp. z o. o., Wolczynska Str. 133, 01-919 Warsaw, Poland
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21
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Kim TY, Park CH. Magnetic Anisotropy and Magnetic Ordering of Transition-Metal Phosphorus Trisulfides. NANO LETTERS 2021; 21:10114-10121. [PMID: 34817186 DOI: 10.1021/acs.nanolett.1c03992] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A magnetic model with an unprecedentedly large number of parameters was determined from first-principles calculations for transition-metal phosphorus trisulfides (TMPS3's), reproducing the measured magnetic ground states of bulk TMPS3's. Our Monte Carlo simulations for the critical temperature, magnetic susceptibility, and specific heat of bulk and few-layer TMPS3's agree well with available experimental data and show that the antiferromagnetic order of TMPS3's persists down to monolayers. Remarkably, the orbital polarization, neglected in recent first-principles studies, dramatically enhances the magnetic anisotropy of FePS3 by almost 2 orders of magnitude. A recent Raman study [Kim, K., Nat. Commun. 2019, 10, 345] claimed that magnetic ordering is absent in monolayer NiPS3 but simultaneously reported a strong two-magnon continuum; we show that the criterion used to judge magnetic ordering therein is invalid for monolayer NiPS3, providing an understanding of the two seemingly contradictory experimental results. The rich predictions on the magnetic susceptibility and specific heat of few-layer TMPS3's await experimental verifications.
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Affiliation(s)
- Tae Yun Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
- Center for Theoretical Physics, Seoul National University, Seoul 08826, Korea
| | - Cheol-Hwan Park
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
- Center for Theoretical Physics, Seoul National University, Seoul 08826, Korea
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22
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Wu Z, Xu S, Zhou Y, Guo Q, Dedkov Y, Voloshina E. Adsorption of Water Molecules on Pristine and Defective NiPX
3
(X: S, Se) Monolayers. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhicheng Wu
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
| | - Sifan Xu
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
| | - Yong Zhou
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
| | - Qilin Guo
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
| | - Yuriy Dedkov
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
- Centre of Excellence ENSEMBLE3 Sp. z o. o. ul. Wolczynska 133 Warsaw 01‐919 Poland
- Institut für Chemie und Biochemie Freie Universität BerlinArnimallee 22 Berlin 14195 Germany
| | - Elena Voloshina
- Department of Physics Shanghai University Shanghai, Shangda Road 99 Shanghai 200444 China
- Centre of Excellence ENSEMBLE3 Sp. z o. o. ul. Wolczynska 133 Warsaw 01‐919 Poland
- Institut für Chemie und Biochemie Freie Universität BerlinArnimallee 22 Berlin 14195 Germany
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