Journal
PHYSICAL REVIEW RESEARCH
Volume 2, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.2.013002
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Funding
- National Key R&D Program of China [2018YFA0305800]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB28000000, XBD07010100]
- National Natural Science Foundation of China [Y81Z01A1A9]
- Beijing Municipal Science and Technology Commission [Z118100004218001]
- Chinese Academy of Sciences [Y929013EA2]
- University of Chinese Academy of Sciences [110200M208]
- Beijing Natural Science Foundation [Z190011]
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We propose two-dimensional (2D) Ising-type ferromagnetic semiconductors TcSiTe3, TcGeSe3, and TcGeTe3 with high Curie temperatures around 200-500 K. Owing to large spin-orbit couplings, the large magnetocrystalline anisotropy energy (MAE), large anomalous Hall conductivity, and large magneto-optical Kerr effect were discovered in these intriguing 2D materials. By comparing all possible 2D MGeTe3 materials (M = 3d, 4d, 5d transition metals), we found a large orbital moment around 0.5 mu(B) per atom and a large MAE for TcGeTe3. The large orbital moments are revealed to be from the comparable crystal fields and electron correlations in these Tc-based 2D materials. The microscopic mechanism of the high Curie temperature is also addressed. Our findings reveal the unique magnetic behaviors of 2D Tc-based materials and present a family of 2D ferromagnetic semiconductors with large MAE and Kerr rotation angles that would have wide applications in designing spintronic devices.
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