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p-orbital magnetic topological states on a square lattice.
- Source :
-
National Science Review . Apr2022, Vol. 9 Issue 4, p1-8. 8p. - Publication Year :
- 2022
-
Abstract
- Honeycomb or triangular lattices were extensively studied and thought to be proper platforms for realizing the quantum anomalous Hall effect (QAHE), where magnetism is usually caused by d orbitals of transition metals. Here we propose that a square lattice can host three magnetic topological states, including the fully spin-polarized nodal loop semimetal, QAHE and the topologically trivial ferromagnetic semiconductor, in terms of the symmetry and k · p model analyses that are material independent. A phase diagram is presented. We further show that the above three magnetic topological states can indeed be implemented in the two-dimensional (2D) materials ScLiCl5, LiScZ5 (Z=Cl, Br) and ScLiBr5, respectively. The ferromagnetism in these 2D materials is microscopically revealed from p electrons of halogen atoms. This present study opens a door to explore the exotic topological states as well as quantum magnetism from p -orbital electrons by means of the material-independent approach. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20955138
- Volume :
- 9
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- National Science Review
- Publication Type :
- Academic Journal
- Accession number :
- 157332038
- Full Text :
- https://doi.org/10.1093/nsr/nwab114