The Map between Symmetries and Orbital Rules to Realize Tunable Band Gap in Quantum Anomalous Hall Effect Material

We establish the map between symmetries and orbital rules to realize tunable band gap in quantum anomalous Hall effect material. This band gap is determined by the SOC between local orbitals associated with band crossing, which is constrained by at least one of lattice symmetries. The band gap could...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-04
Main Authors: Jiaohong Shu, Zhao, Xinxin, Fan, Weiqin, Wang, Lili, Chen, Guanglong, Wu, Jianbao, Mi, Yiming
Format: Article
Language:English
Subjects:
Energy gap
Magnetization
Quantum Hall effect
Rotation
Symmetry
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We establish the map between symmetries and orbital rules to realize tunable band gap in quantum anomalous Hall effect material. This band gap is determined by the SOC between local orbitals associated with band crossing, which is constrained by at least one of lattice symmetries. The band gap could be turned on/off by breaking or keeping corresponding lattice symmetry through rotation of magnetization direction. The components of local orbital related to band crossing is required to match the symmetry, and to produce non-zero SOC when symmetry is broken. Following this map, the TiSb monolayer is predicted to be a quantum anomalous Hall effect material with a band gap adjusted in the range of 0 to 209 meV through magnetization direction rotation.
ISSN:2331-8422