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Wang Z, Qureshi AH, Duan Y, Liu Y, Wang Y, Zhu J, Lu J, Guo T, Liu Y, Zhang X. Prediction of Two-Dimensional Janus Transition-Metal Chalcogenides: Robust Ferromagnetic Semiconductor with High Curie Temperature. Molecules 2024; 29:3915. [PMID: 39202993 PMCID: PMC11357067 DOI: 10.3390/molecules29163915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/17/2024] [Accepted: 08/17/2024] [Indexed: 09/03/2024] Open
Abstract
Two-dimensional (2D) ferromagnetic semiconductors (FM SCs) provide an ideal platform for the development of quantum information technology in nanoscale devices. However, many developed 2D FM materials present a very low Curie temperature (TC), greatly limiting their application in spintronic devices. In this work, we predict two stable 2D transition metal chalcogenides, V3Se3X2 (X = S, Te) monolayers, by using first-principles calculations. Our results show that the V3Se3Te2 monolayer is a robust bipolar magnetic SC with a moderate bandgap of 0.53 eV, while V3Se3S2 is a direct band-gap FM SC with a bandgap of 0.59 eV. Interestingly, the ferromagnetisms of both monolayers are robust due to the V-S/Se/Te-V superexchange interaction, and TCs are about 406 K and 301 K, respectively. Applying biaxial strains, the FM SC to antiferromagnetic (AFM) SC transition is revealed at 5% and 3% of biaxial tensile strain. In addition, their high mechanical, dynamical, and thermal stabilities are further verified by phonon dispersion calculations and ab initio molecular dynamics (AIMD) calculations. Their outstanding attributes render the V3Se3Y2 (Y = S, Te) monolayers promising candidates as 2D FM SCs for a wide range of applications.
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Affiliation(s)
- Zijin Wang
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Ali Hamza Qureshi
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Yuanyuan Duan
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Yujie Liu
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Yanbiao Wang
- Department of Fundamental Courses, Wuxi Institute of Technology, Wuxi 214121, China
| | - Jun Zhu
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Jinlian Lu
- Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China;
| | - Tianxia Guo
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Yongjun Liu
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
| | - Xiuyun Zhang
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (Z.W.); (T.G.)
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2
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Wu J, Guo R, Wu D, Li X, Wu X. Turning Nonmagnetic Two-Dimensional Molybdenum Disulfides into Room-Temperature Ferromagnets by the Synergistic Effect of Lattice Stretching and Charge Injection. J Phys Chem Lett 2024; 15:2293-2300. [PMID: 38386013 DOI: 10.1021/acs.jpclett.3c03478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Exploring two-dimensional (2D) room-temperature magnetic materials in the field of 2D spintronics remains a formidable challenge. The vast array of nonmagnetic 2D materials provides abundant resources for exploration, but the strategy to convert them into intrinsic room-temperature magnets remains elusive. To address this challenge, we present a general strategy based on surface halogenation for the transition from nonmagnetism to intrinsic room-temperature ferromagnetism in 2D MoS2 based on first-principles calculations. The derived 2D halogenated MoS2 are half-semimetals with a high Curie temperature (TC) of 430-589 K and excellent stability. In-depth mechanistic studies revealed that this marvelous nonmagnetism-to-ferromagnetism transition originates from the modulation of the splitting as well as the occupation of the Mo d orbitals by the synergy of lattice stretching and charge injection induced by the surface halogenation. This work establishes a promising route for exploring 2D room-temperature magnetic materials from the abundant pool of 2D nonmagnetic counterparts.
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Affiliation(s)
- Jing Wu
- School of Physics and Technology, Center for Quantum Transport and Thermal Energy Science, Nanjing Normal University, Nanjing 210023, China
- Yancheng Kangju Road Junior Middle School, Yancheng 224000, China
| | - Ruyi Guo
- School of Physics and Technology, Center for Quantum Transport and Thermal Energy Science, Nanjing Normal University, Nanjing 210023, China
| | - Daoxiong Wu
- School of Marine Science and Engineering, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Xiuling Li
- School of Physics and Technology, Center for Quantum Transport and Thermal Energy Science, Nanjing Normal University, Nanjing 210023, China
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Xiaojun Wu
- Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, CAS Key Laboratory of Materials for Energy Conversion, CAS Center for Excellence in Nanoscience, and School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
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3
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Lopes EVC, Baierle RJ, Miwa RH, Schmidt TM. Noncentrosymmetric two-dimensional Weyl semimetals in porous Si/Ge structures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:185701. [PMID: 38215486 DOI: 10.1088/1361-648x/ad1e09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 01/12/2024] [Indexed: 01/14/2024]
Abstract
In this work we predict a family of noncentrosymmetric two-dimensional (2D) Weyl semimetals (WSMs) composed by porous Ge and SiGe structures. These systems are energetically stable graphenylene-like structures with a buckling, spontaneously breaking the inversion symmetry. The nontrivial topological phase for these 2D systems occurs just below the Fermi level, resulting in nonvanishing Berry curvature around the Weyl nodes. The emerged WSMs are protected byC3symmetry, presenting one-dimensional edge Fermi-arcs connecting Weyl points with opposite chiralities. Our findings complete the family of Weyl in condensed-matter physics, by predicting the first noncentrosymmetric class of 2D WSMs.
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Affiliation(s)
- Emmanuel V C Lopes
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400-902, Brazil
| | - Rogério J Baierle
- Departamento de Física, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul 97105-990, Brazil
| | - Roberto H Miwa
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400-902, Brazil
| | - Tome M Schmidt
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400-902, Brazil
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Khanh Nguyen D, Ponce-Pérez R, Guerrero-Sanchez J, Hoat DM. Surface functionalization of graphene-like boron arsenide monolayer: a first-principles study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:055001. [PMID: 37871594 DOI: 10.1088/1361-648x/ad05fa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 10/23/2023] [Indexed: 10/25/2023]
Abstract
In this work, the effects of hydrogen (H) and oxygen (O) adsorption on the electronic and magnetic properties of graphene-like boron arsenide (BAs) monolayer are investigated using first-principles calculations. Pristine monolayer is a non-magnetic two-dimensional (2D) material, exhibiting direct gap semiconductor character with band gap of 0.75 (1.18) eV as calculated by generalized gradient approximation with Perdew-Burke-Ernzerhof (HSE06) functional. Four high-symmetry adsorption sites are considered, including on-top of B atom (TB), on-top of As atom (TAs), on-top of hollow site (TH), and on-top of bridge site (Tbridge). Using the criterion of adsorption energy, it is found thatTBandTbridgesites are favorable adsorption sites for H and O adatom, respectively. The analysis of electronic interactions indicate the charge transfer from host BAs monolayer to both adatoms. H adsorption conducts to the emergence of magnetic semiconductor nature in BAs monolayer with a total magnetic moment of 1.00 μB. Herein, the magnetism is originated mainly from H adatom and its neighbor As atoms. In contrast, the non-magnetic nature of BAs monolayer is preserved upon absorbing O atoms. In this case, the energy gap exhibits a slight reduction of 4%. Further, the effects of adatom coverage are also analyzed. The presented results suggest an effective modification of ground state electronic properties, as well as induction of new feature-rich properties to make new multifunctional 2D materials from non-magnetic BAs monolayer.
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Affiliation(s)
- Duy Khanh Nguyen
- Laboratory for Computational Physics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam
- Faculty of Mechanical-Electrical and Computer Engineering, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - R Ponce-Pérez
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Apartado Postal 14, Ensenada, Baja California Código Postal 22800, Mexico
| | - J Guerrero-Sanchez
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Apartado Postal 14, Ensenada, Baja California Código Postal 22800, Mexico
| | - D M Hoat
- Institute of Theoretical and Applied Research, Duy Tan University, Ha Noi 100000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
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5
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Wang J, Zeng H, Duan W, Huang H. Intrinsic Nonlinear Hall Detection of the Néel Vector for Two-Dimensional Antiferromagnetic Spintronics. PHYSICAL REVIEW LETTERS 2023; 131:056401. [PMID: 37595209 DOI: 10.1103/physrevlett.131.056401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/29/2023] [Accepted: 06/30/2023] [Indexed: 08/20/2023]
Abstract
The respective unique merit of antiferromagnets and two-dimensional (2D) materials in spintronic applications inspires us to exploit 2D antiferromagnetic spintronics. However, the detection of the Néel vector in 2D antiferromagnets remains a great challenge because the measured signals usually decrease significantly in the 2D limit. Here we propose that the Néel vector of 2D antiferromagnets can be efficiently detected by the intrinsic nonlinear Hall (INH) effect which exhibits unexpected significant signals. As a specific example, we show that the INH conductivity of the monolayer manganese chalcogenides MnX (X=S, Se, Te) can reach the order of nm·mA/V^{2}, which is orders of magnitude larger than experimental values of paradigmatic antiferromagnetic spintronic materials. The INH effect can be accurately controlled by shifting the chemical potential around the band edge, which is experimentally feasible via electric gating or charge doping. Moreover, we explicitly demonstrate its 2π-periodic dependence on the Néel vector orientation based on an effective k·p model. Our findings enable flexible design schemes and promising material platforms for spintronic memory device applications based on 2D antiferromagnets.
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Affiliation(s)
- Jizhang Wang
- School of Physics, Peking University, Beijing 100871, China
| | - Hui Zeng
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Wenhui Duan
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
- Institute for Advanced Study, Tsinghua University, Beijing 100084, China
- Frontier Science Center for Quantum Information, Beijing 100084, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
| | - Huaqing Huang
- School of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
- Center for High Energy Physics, Peking University, Beijing 100871, China
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6
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Bai Y, Shi R, Wu Y, Wang B, Zhang X. Cr 2XTe 4(X = Si, Ge) monolayers: a new type of two-dimensional high- TCIsing ferromagnetic semiconductors with a large magnetic anisotropy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:384001. [PMID: 35793684 DOI: 10.1088/1361-648x/ac7f16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Two-dimensional (2D) ferromagnetic semiconductor (FMS) provides the ideal platform for the development of quantum information technology in nanoscale devices. However, most of them suffer from low Curie temperature and small magnetic anisotropic energy (MAE), severely limiting their practical application. In this work, by using first-principles calculations, we predicted two stable 2D materials, namely, Cr2SiTe4and Cr2GeTe4monolayers. Interestingly, both of them are intrinsic direct band gap FMSs (∼1 eV) with a large magnetization (8µBf.u.-1) and sizable MAE (∼500μeV Cr-1). Monte Carlo simulations based on Heisenberg model suggest markedly high Curie temperatures of these monolayers (∼200 K). Besides, their high mechanical, dynamical, and thermal stabilities are further verified by elastic constants, phonon dispersion calculations, andab initiomolecular dynamics simulations. The outstanding attributes render Cr2XTe4(X = Si, Ge) monolayers broadening the candidates of 2D FMS for a wide range of applications.
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Affiliation(s)
- Yihang Bai
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
| | - Rui Shi
- Patent Examination Cooperation (Henan) Center of the Patent Office, China National Intellectual Property Administration, Zhengzhou 450000, People's Republic of China
| | - Yaxuan Wu
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
| | - Bing Wang
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China
| | - Xiuyun Zhang
- College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, People's Republic of China
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7
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Ur Rahman A, Sadiq T, Khan R, Anwar R, Gul B, Dahshan A. Tunable electronic and magnetic properties of single layer CdS via Li substitutional doping: A first-principle study. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 2022; 161:110380. [DOI: 10.1016/j.jpcs.2021.110380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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8
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Gao M, Han X, Liu W, Tian Z, Mei Y, Zhang M, Chu PK, Kan E, Hu T, Du Y, Qiao S, Di Z. Graphene-mediated ferromagnetic coupling in the nickel nano-islands/graphene hybrid. SCIENCE ADVANCES 2021; 7:7/30/eabg7054. [PMID: 34301602 PMCID: PMC8302123 DOI: 10.1126/sciadv.abg7054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 06/07/2021] [Indexed: 06/13/2023]
Abstract
Nanoscale magnetic structures are fundamental to the design and fabrication of spintronic devices and have exhibited tremendous potential superior to the conventional semiconductor devices. However, most of the magnetic moments in nanostructures are unstable due to size effect, and the possible solution based on exchange coupling between nanomagnetism is still not clear. Here, graphene-mediated exchange coupling between nanomagnets is demonstrated by depositing discrete superparamagnetic Ni nano-islands on single-crystal graphene. The heterostructure exhibits ideal two-dimensional (2D) ferromagnetism with clear hysteresis loops and Curie temperature up to 80 K. The intrinsic ferromagnetism in graphene and antiferromagnetic exchange coupling between graphene and Ni nano-islands are revealed by x-ray magnetic circular dichroism and density functional theory calculations. The artificial 2D ferromagnets constitute a platform to study the coupling mechanism between complex correlated electronic systems and magnetism on the nanoscale, and the results and concept provide insights into the realization of spin manipulation in quantum computing.
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Affiliation(s)
- Min Gao
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaowen Han
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenjing Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
| | - Ziao Tian
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
| | - Yongfeng Mei
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - Miao Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Erjun Kan
- Department of Applied Physics and Institution of Energy and Microstructure, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Tao Hu
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
| | - Yongping Du
- Department of Applied Physics and Institution of Energy and Microstructure, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Shan Qiao
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zengfeng Di
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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Ionov AN, Volkov MP, Nikolaeva MN, Smyslov RY, Bugrov AN. Magnetization of Ultraviolet-Reduced Graphene Oxide Flakes in Composites Based on Polystyrene. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2519. [PMID: 34066252 PMCID: PMC8151044 DOI: 10.3390/ma14102519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/02/2021] [Accepted: 05/07/2021] [Indexed: 01/03/2023]
Abstract
This work presents our study results of the magnetization of multilayer UV-reduced graphene oxide (UV-rGO), polymer matrix (polystyrene), and a conjugated composite based on them. The mesoscopic structure of the composites synthesized in this work was studied by such methods as X-ray diffraction, SEM, as well as NMR-, IR- and Raman spectroscopy. The magnetization of the composites under investigation and their components was measured using a vibrating-sample magnetometer. It has been shown that the UV-reduction process leads to the formation of many submicron holes distributed inside rGO flakes, which can create edge defects, causing possibly magnetic order in the graphite samples under investigation on the mesoscopic level. This article provides an alternative explanation for the ferromagnetic hysteresis loop in UV-rGO on the base of superconductivity type-II.
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Affiliation(s)
- Alexander N. Ionov
- Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia; (A.N.I.); (M.P.V.)
| | - Mikhail P. Volkov
- Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia; (A.N.I.); (M.P.V.)
| | - Marianna N. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr-t 31, 199004 St. Petersburg, Russia; (M.N.N.); (R.Y.S.)
| | - Ruslan Y. Smyslov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr-t 31, 199004 St. Petersburg, Russia; (M.N.N.); (R.Y.S.)
- Graduate School of Biomedical Systems and Technology, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University (SPbPU), Polytechnicheskaya 29, 195251 St. Petersburg, Russia
| | - Alexander N. Bugrov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr-t 31, 199004 St. Petersburg, Russia; (M.N.N.); (R.Y.S.)
- Department of Physical Chemistry, Saint Petersburg Electrotechnical University (ETU “LETI”), ul. Professora Popova 5, 197376 St. Petersburg, Russia
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10
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Yang Q, Wu M, Li J. Origin of Two-Dimensional Vertical Ferroelectricity in WTe 2 Bilayer and Multilayer. J Phys Chem Lett 2018; 9:7160-7164. [PMID: 30540485 DOI: 10.1021/acs.jpclett.8b03654] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In a recent report, room-temperature vertical ferroelectricity was experimentally shown in WTe2 bilayer, while its mechanism of ferroelectric switching without vertical ion displacements remains unclarified. In this work, we reveal its origin by first-principles calculations that the polarization stems from uncompensated interlayer vertical charge transfer depending on in-plane translation, which can be switched upon interlayer sliding. The calculated results are consistent with experimental data, and a similar switching mechanism can be applied to a multilayer counterpart. Despite its small ferroelectric switching barrier and polarization, the in-plane rigidity of WTe2 layer gives rise to a high Curie temperature. A moire pattern of ferroelectric domain superlattice can be formed and tuned upon a small-angle twist of bilayer, which is unique compared with traditional ferroelectrics. Similar interlayer translational ferroelectricity may exist in a series of van der Waals bilayers or even bulk phases.
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Affiliation(s)
- Qing Yang
- School of Physics , Huazhong University of Science and Technology , Wuhan , Hubei 430074 , China
| | - Menghao Wu
- School of Physics , Huazhong University of Science and Technology , Wuhan , Hubei 430074 , China
| | - Ju Li
- Department of Nuclear Science and Engineering and Department of Materials Science and Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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11
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Jiang Z, Wang P, Xing J, Jiang X, Zhao J. Screening and Design of Novel 2D Ferromagnetic Materials with High Curie Temperature above Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2018; 10:39032-39039. [PMID: 30350933 DOI: 10.1021/acsami.8b14037] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two-dimensional (2D) intrinsic ferromagnets with high Curie temperature ( TC) are desirable for spintronic applications. Using systematic first-principles calculations, we investigate the electronic and magnetic properties of 22 monolayer 2D materials with layered bulk phases. From these candidates, we screen out five ferromagnetic monolayer materials belonging to three types of structures: type i (ScCl, YCl, LaCl), type ii (LaBr2), and type iii (CrSBr). Type i is a kind of metallic ferromagnetic material, whereas LaBr2 and CrSBr of type ii and iii are small-bandgap ferromagnetic semiconductors with TC near room temperature. Moreover, the ferromagnetic CrSBr monolayer possesses a large magnetic moment of ∼3 μB per Cr atom, originating from its distorted octahedron coordination. The robust ferromagnetism of the CrSBr monolayer is ascribed to the halogen-mediated (Cr-Br-Cr) and chalcogen-mediated (Cr-S-Cr) superexchange interactions; then, an isoelectronic substitution strategy is proposed to tailor the magnetic coupling strength. Hence, monolayer structures of CrSI, CrSCl, and CrSeBr with notably enhanced Curie temperature up to 500 K as well as favorable formation energy are designed. The moderate interlayer binding energy and high TC make these monolayer ferromagnetic materials feasible for experimental synthesis and attractive as 2D spintronic devices.
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Affiliation(s)
- Zhou Jiang
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian , 116024 , China
| | - Peng Wang
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian , 116024 , China
| | - Jianpei Xing
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian , 116024 , China
| | - Xue Jiang
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian , 116024 , China
| | - Jijun Zhao
- Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian , 116024 , China
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12
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Ma F, Jiao Y, Jiang Z, Du A. Rhombohedral Lanthanum Manganite: A New Class of Dirac Half-Metal with Promising Potential in Spintronics. ACS APPLIED MATERIALS & INTERFACES 2018; 10:36088-36093. [PMID: 30277382 DOI: 10.1021/acsami.8b09349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dirac half-metals have drawn great scientific interests in spintronics because of their outstanding physical properties such as the large spin polarization and massless Dirac fermions. By using first-principles calculations, we investigate the perovskite-type lanthanum manganite (LaMnO3) as a novel Dirac half-metal. Specifically, LaMnO3 displays multiple linear band crossings in the spin-up direction, while it has a large band gap (∼5 eV) in the spin-down orientation. The intriguing linear band dispersions guarantee the ultrafast electron transport and the significant band differences between spin up and down directions promise the realization of 100% spin-polarized current and the extremely low energy consumption. Such a spin-polarized Dirac material is rare among perovskite-type compounds. By adopting the mean-field theory, the estimated Curie temperature Tc is 438.4 K. Importantly, the LaMnO3 crystal has been experimentally realized 2 decades ago, which facilitates the future experimental validation. With the novel spin-polarized electronic properties and the high possibility of experimental fabrication, LaMnO3 is ideal for the spintronic application.
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Affiliation(s)
- Fengxian Ma
- Shaanxi Key Laboratory for Theoretical Physics Frontiers, Institute of Modern Physics , Northwest University , Xi'an 710069 , PR China
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , Gardens Point Campus , Queensland 4001 , Brisbane , Australia
| | - Yalong Jiao
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , Gardens Point Campus , Queensland 4001 , Brisbane , Australia
| | - Zhenyi Jiang
- Shaanxi Key Laboratory for Theoretical Physics Frontiers, Institute of Modern Physics , Northwest University , Xi'an 710069 , PR China
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , Gardens Point Campus , Queensland 4001 , Brisbane , Australia
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13
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Wu Q, Zhang Y, Zhou Q, Wang J, Zeng XC. Transition-Metal Dihydride Monolayers: A New Family of Two-Dimensional Ferromagnetic Materials with Intrinsic Room-Temperature Half-Metallicity. J Phys Chem Lett 2018; 9:4260-4266. [PMID: 30001619 DOI: 10.1021/acs.jpclett.8b01976] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two-dimensional (2D) ferromagnetic materials with intrinsic half-metallicity are highly desirable for nanoscale spintronic applications. Here, we predict a new and stable family of 2D transition-metal dihydride (MH2; M = Sc, Ti, V, Cr, Fe, Co, Ni) monolayers with novel properties. Our density functional theory computation shows that CoH2 and ScH2 monolayers are ferromagnetic metals, while the others are antiferromagnetic semiconductors. In particular, the CoH2 monolayer is a perfect half-metal with a wide spin gap of 3.48 eV. The ScH2 monolayer can also possess half-metallicity through hole doping. Most importantly, our Monte Carlo simulations show that the CoH2 monolayer possesses an above-room-temperature Curie point (339 K), while that of the ScH2 monolayer can also reach 160 K. A synthetic approach is proposed to realize CoH2 and ScH2 monolayers in the laboratory. Notably, their half-metallicity can be well maintained on substrates. The new family of MH2 monolayers are promising functional materials for spintronic applications due to their novel magnetic properties.
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Affiliation(s)
- Qisheng Wu
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588 , United States
| | - Yehui Zhang
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
| | - Qionghua Zhou
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
| | - Jinlan Wang
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
- Synergetic Innovation Center for Quantum Effects and Applications (SICQEA) , Hunan Normal University , Changsha , Hunan 410081 , China
| | - Xiao Cheng Zeng
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588 , United States
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Zhang X, Chen A, Zhou Z. High‐throughput computational screening of layered and two‐dimensional materials. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1385] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xu Zhang
- School of Materials Science and Engineering, National Institute for Advanced Materials, Institute of New Energy Material Chemistry, Computational Centre for Molecular Science, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin) Nankai University Tianjin China
| | - An Chen
- School of Materials Science and Engineering, National Institute for Advanced Materials, Institute of New Energy Material Chemistry, Computational Centre for Molecular Science, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin) Nankai University Tianjin China
| | - Zhen Zhou
- School of Materials Science and Engineering, National Institute for Advanced Materials, Institute of New Energy Material Chemistry, Computational Centre for Molecular Science, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin) Nankai University Tianjin China
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15
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Wu M, Jena P. The rise of two‐dimensional van der Waals ferroelectrics. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1365] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Menghao Wu
- School of Physics and Wuhan National High Magnetic Field CenterHuazhong University of Science and TechnologyWuhanChina
| | - Puru Jena
- Department of PhysicsVirginia Commonwealth UniversityRichmondVirginia
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16
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Mayorga-Martinez CC, Sofer Z, Luxa J, Huber Š, Sedmidubský D, Brázda P, Palatinus L, Mikulics M, Lazar P, Medlín R, Pumera M. TaS 3 Nanofibers: Layered Trichalcogenide for High-Performance Electronic and Sensing Devices. ACS NANO 2018; 12:464-473. [PMID: 29227684 DOI: 10.1021/acsnano.7b06853] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Layered materials, like transition metal dichalcogenides, exhibit broad spectra with outstanding properties with huge application potential, whereas another group of related materials, layered transition metal trichalcogenides, remains unexplored. Here, we show the broad application potential of this interesting structural type of layered tantalum trisulfide prepared in a form of nanofibers. This material shows tailorable attractive electronic properties dependent on the tensile strain applied to it. Structure of this so-called orthorhombic phase of TaS3 grown in a form of long nanofibers has been solved and refined. Taking advantage of these capabilities, we demonstrate a highly specific impedimetric NO gas sensor based on TaS3 nanofibers as well as construction of photodetectors with excellent responsivity and field-effect transistors. Various flexible substrates were used for the construction of a NO gas sensor. Such a device exhibits a low limit of detection of 0.48 ppb, well under the allowed value set by environmental agencies for NOx (50 ppb). Moreover, this NO gas sensor also showed excellent selectivity in the presence of common interferences formed during fuel combustion. TaS3 nanofibers produced in large scale exhibited excellent broad application potential for various types of devices covering nanoelectronic, optoelectronic, and gas-sensing applications.
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Affiliation(s)
- Carmen C Mayorga-Martinez
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences Nanyang Technological University , Nanyang Link 21, Singapore 637371
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technická 5, 166 28 Prague 6, Czech Republic
| | - Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technická 5, 166 28 Prague 6, Czech Republic
| | - Štěpán Huber
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technická 5, 166 28 Prague 6, Czech Republic
| | - David Sedmidubský
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technická 5, 166 28 Prague 6, Czech Republic
| | - Petr Brázda
- Institute of Physics of the CAS , v.v.i., Na Slovance 2, 182 00 Prague 8, Czech Republic
| | - Lukáš Palatinus
- Institute of Physics of the CAS , v.v.i., Na Slovance 2, 182 00 Prague 8, Czech Republic
| | - Martin Mikulics
- Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich, and Jülich-Aachen Research Alliance, JARA, Fundamentals of Future Information Technology, D-52425 Jülich, Germany
| | - Petr Lazar
- Department of Physical Chemistry and Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc , tř. 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
| | - Rostislav Medlín
- New Technologies - Research Centre, University of West Bohemia , Univerzitní 8, 306 14 Plzeň, Czech Republic
| | - Martin Pumera
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences Nanyang Technological University , Nanyang Link 21, Singapore 637371
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague , Technická 5, 166 28 Prague 6, Czech Republic
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17
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Sun Y, Zhuo Z, Wu X, Yang J. Room-Temperature Ferromagnetism in Two-Dimensional Fe 2Si Nanosheet with Enhanced Spin-Polarization Ratio. NANO LETTERS 2017; 17:2771-2777. [PMID: 28441496 DOI: 10.1021/acs.nanolett.6b04884] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Searching experimental feasible two-dimensional (2D) ferromagnetic crystals with large spin-polarization ratio, high Curie temperature and large magnetic anisotropic energy is one key to develop next-generation spintronic nanodevices. Here, 2D Fe2Si nanosheet, one counterpart of Hapkeite mineral discovered in meteorite with novel magnetism is proposed on the basis of first-principles calculations. The 2D Fe2Si crystal has a slightly buckled triangular lattice with planar hexacoordinated Si and Fe atoms. The spin-polarized calculations with hybrid HSE06 function method indicate that 2D Fe2Si is a ferromagnetic half metal at its ground state with 100% spin-polarization ratio at Fermi energy level. The phonon spectrum calculation and ab initio molecular dynamic simulation shows that 2D Fe2Si crystal has a high thermodynamic stability and its 2D lattice can be retained at the temperature up to 1200 K. Monte Carlo simulations based on the Ising model predict a Curie temperature over 780 K in 2D Fe2Si crystal, which can be further tuned by applying a biaxial strain. Moreover, 2D structure and strong in-plane Fe-Fe interaction endow Fe2Si nanosheet sizable magnetocrystalline anisotropy energy with the magnitude of at least two orders larger than those of Fe, Co and Ni bulks. These novel magnetic properties render the 2D Fe2Si crystal a very promising material for developing practical spintronic nanodevices.
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Affiliation(s)
- Yingjie Sun
- CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, ‡Hefei National Laboratory for Physical Science at the Microscale, and §Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Zhiwen Zhuo
- CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, ‡Hefei National Laboratory for Physical Science at the Microscale, and §Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Xiaojun Wu
- CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, ‡Hefei National Laboratory for Physical Science at the Microscale, and §Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Jinlong Yang
- CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, ‡Hefei National Laboratory for Physical Science at the Microscale, and §Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
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Feng YP, Shen L, Yang M, Wang A, Zeng M, Wu Q, Chintalapati S, Chang CR. Prospects of spintronics based on 2D materials. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1313] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yuan Ping Feng
- Department of Physics; National University of Singapore; Singapore
- Centre for Advanced Two-dimensional Materials; National University of Singapore; Singapore
| | - Lei Shen
- Department of Mechanical Engineering; National University of Singapore; Singapore
- Engineering Science Programme; National University of Singapore; Singapore
| | - Ming Yang
- Institute of Materials Science and Engineering; A*STAR; Singapore
| | - Aizhu Wang
- Department of Physics; National University of Singapore; Singapore
- Department of Electrical and Computer Engineering; National University of Singapore; Singapore
| | | | - Qingyun Wu
- Department of Materials Science and Engineering; National University of Singapore; Singapore
| | - Sandhya Chintalapati
- Centre for Advanced Two-dimensional Materials; National University of Singapore; Singapore
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