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- Title
Symmetry-Protected Two-Dimensional Half-Semi-Metal NiVS<sub>6</sub>As<sub>2</sub> Monolayer.
- Authors
Zhu, Meng-xue; Ji, Wei-xiao; Zhu, Hui-wen; Cao, Qiang; Zhang, Bao-min
- Abstract
Two-dimensional (2D) half-metallic magnets are expected to achieve breakthroughs in the field of spintronics and quantum computation due to their 100% spin polarization and non-dissipative ballistic transport characteristics. However, the current availability of practical applications for these materials is limited. In this paper, a new 2D material NiVS6As2 is predicted based on density functional theory (DFT). It has a ferromagnetic ground state with a high Curie temperature, TC = 150 K and half-semi-metal (HSM) band structure protected by a structural symmetry degeneracy point on the Fermi surface, which can be controlled by an electric field and strain. When an out-of-plane electric field is applied, NiVS6As2 shows a Chern insulator with a quantum anomalous Hall (QAH) effect. These results expand the family of 2D magnetic semimetals, and provide new theoretical inspiration for understanding the protection of degenerate point symmetry.
- Subjects
SCHWABISCH Hall (Germany); QUANTUM Hall effect; ANOMALOUS Hall effect; MAGNETIC materials; SPIN polarization; FERMI surfaces
- Publication
Journal of Electronic Materials, 2024, Vol 53, Issue 10, p6250
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-024-11321-4