1
|
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.
Collapse
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
| |
Collapse
|
2
|
Cen W, Tian Z. Improving the magnetic moment of Ca 2Ge and promoting the conversion of semiconductors to diluted magnetic semiconductors using Mn-doping. RSC Adv 2024; 14:6930-6937. [PMID: 38410366 PMCID: PMC10895644 DOI: 10.1039/d3ra07294k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 01/18/2024] [Indexed: 02/28/2024] Open
Abstract
The dilute magnetic properties of materials have important potential applications in the field of electronic science and technology. Intrinsic Ca2Ge is a new environmentally friendly semiconductor material, and exhibits cubic and orthorhombic phases. The crystal structure characteristics of Ca2Ge indicate that the modulation of its dilute magnetic properties can theoretically be achieved by doping with magnetic elements. The study of band structures shows that Ca2Ge is a semiconductor, while Mn doped Ca2Ge is a semi-metal. The results of density of states and atomic population analysis show that Mn doped Ca2Ge exhibits ferrimagnetism with a magnetic moment of 5 μB, and the orbital splitting energy of the Mn atom is 1.0 eV. Mn-doping changes the cubic crystal field of Ca2Ge, and the charge transfer and electron polarization of Ca d and Ge p orbitals are affected by Mn atoms. The Ca d orbital is split into dzz, dzy, dzx, dxx-yy and dxy orbitals, and the contribution of spin of each d split orbital to the magnetic moment of the Ca d orbital is in the order dxy > dyz > dxz > dxx-yy > dzz. The Ge p orbital is split into px, py and pz orbitals, and the spin contribution of each p orbital to the magnetic moment of the Ge p orbital is in the order py > pz > px. The analysis of atom populations shows that the charge transfer and spin of Ca and Ge change with Mn doping, and the difference between spin up and spin down increases, improving the magnetism of Ca2Ge and forming a dilute magnetic semiconductor.
Collapse
Affiliation(s)
- Weifu Cen
- College of Big Data and Information Engineering, Guizhou University Guiyang 550025 China
- School of Material Science and Engineering, Guizhou Minzu University Guiyang 550025 China
| | - Zean Tian
- College of Big Data and Information Engineering, Guizhou University Guiyang 550025 China
- College of Computer Science and Electronic Engineering, Hunan University 410082 China
| |
Collapse
|
3
|
Li X, Liu QB, Tang Y, Li W, Ding N, Liu Z, Fu HH, Dong S, Li X, Yang J. Quintuple Function Integration in Two-Dimensional Cr(II) Five-Membered Heterocyclic Metal Organic Frameworks via Tuning Ligand Spin and Lattice Symmetry. J Am Chem Soc 2023; 145:7869-7878. [PMID: 36926870 DOI: 10.1021/jacs.2c12780] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Two-dimensional (2D) semiconductors (SCs) integrated with two or more functions are the cornerstone for constructing multifunctional nanodevices but remain largely limited. Here, by tuning the spin state of organic linkers and the symmetry/topology of crystal lattices, we predict a class of unprecedented multifunctional SCs in 2D Cr(II) five-membered heterocyclic metal organic frameworks that simultaneously possess auxetic effect, room-temperature ferrimagnetism, chiral ferroelectricity (FE), electrically reversible spin polarization, and topological nodal lines/points. Taking 2D Cr(TDZ)2 (TDZ = 1.2.5-thiadiazole) as an exemplification, the auxetic effect is produced by the antitetra-chiral lattice structure. The high temperature ferrimagnetism originates from the strong d-p direct magnetic exchange interaction between Cr cations and TDZ doublet radical anions. Meanwhile, the clockwise-counterclockwise alignment of TDZ's dipoles results in unique 2D chiral FE with atomic-scale vortex-antivortex states. 2D Cr(TDZ)2 is an intrinsic bipolar magnetic SC where half-metallic conduction with switchable spin-polarization direction can be induced by applying a gate voltage. In addition, the symmetry of the little group C4 of the lattice structure endows 2D Cr(TDZ)2 with topological nodal lines and a quadratic nodal point in the Brillouin zone near the Fermi level.
Collapse
Affiliation(s)
- Xiangyang Li
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.,School of Materials Science and Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Qing-Bo Liu
- Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan 430073, China.,School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yongsen Tang
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Wei Li
- Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ning Ding
- School of Physics, Southeast University, Nanjing 211189, China
| | - Zhao Liu
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hua-Hua Fu
- School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shuai Dong
- School of Physics, Southeast University, Nanjing 211189, China
| | - Xingxing Li
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.,Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China.,Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.,Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China.,Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| |
Collapse
|
4
|
Zhao XK, Cao CS, Liu JC, Lu JB, Li J, Hu HS. Theoretical Prediction of Graphene-like 2D Uranyl Material with p-Orbital Antiferromagnetism. Chem Sci 2022; 13:8518-8525. [PMID: 35974750 PMCID: PMC9337721 DOI: 10.1039/d2sc02017c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/23/2022] [Indexed: 11/21/2022] Open
Abstract
Versatile graphene-like two-dimensional materials with s-, p- and d-block elements have aroused significant interests because of their extensive applications while there is a lack of f-block one. Herein we report...
Collapse
Affiliation(s)
- Xiao-Kun Zhao
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University Beijing 100084 China
| | - Chang-Su Cao
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University Beijing 100084 China
| | - Jin-Cheng Liu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University Beijing 100084 China
| | - Jun-Bo Lu
- Department of Chemistry, Southern University of Science and Technology Shenzhen 518055 China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University Beijing 100084 China
- Department of Chemistry, Southern University of Science and Technology Shenzhen 518055 China
| | - Han-Shi Hu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University Beijing 100084 China
| |
Collapse
|