文献类型：期刊文献

英文题名：Layer-locked anomalous valley Hall effect in a two-dimensional A-type tetragonal antiferromagnetic insulator

作者：Guo, San-Dong[1];Xu, Wei[2,3,4];Xue, Yang[5];Zhu, Gangqiang[6];Ang, Yee Sin[7]

机构：[1]Xian Univ Posts & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China;[2]Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[3]Fudan Univ, Key Lab Computat Phys Sci MOE, Shanghai 200433, Peoples R China;[4]Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China;[5]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[6]Shaanxi Normal Univ, Sch Phys & Elect Informat, Xian 716000, Shaanxi, Peoples R China;[7]Singapore Univ Technol & Design, Sci Math & Technol SMT Cluster, Singapore 487372, Singapore

年份：2024

卷号：109

期号：13

外文期刊名：PHYSICAL REVIEW B

收录：;EI(收录号：20241715962863);WOS:【SCI-EXPANDED(收录号:WOS:001239061100003)】；

基金：This work is supported by Natural Science Basis Research Plan in Shaanxi Province of China (Grant No. 2021JM-456) . Y.S.A. is supported by the Singapore Ministry of Education Academic Research Fund Tier 2 (Award No. MOE-T2EP50221-0019) . We are grateful to Shanxi Supercomputing Center of China, and the calculations were performed on TianHe-2.

语种：英文

外文关键词：Antiferromagnetism - Bromine compounds - Electric fields - Energy efficiency - Iron compounds - Landforms - Magnesium compounds - Quantum Hall effect - Spin Hall effect

摘要：Antiferromagnetic (AFM) spintronics provides a route towards energy -efficient and ultrafast device applications. Achieving anomalous valley Hall effect (AVHE) in AFM monolayers is thus of considerable interest for both fundamental condensed -matter physics and device engineering. Here we propose a route to achieve an AVHE in A -type AFM insulator composed of vertically stacked monolayer quantum anomalous Hall insulators with strain and electric field modulations. Uniaxial strain and electric field generate valley polarization and spin splitting, respectively. Using first -principles calculations, Fe 2 BrMgP monolayer is predicted to be a prototype hosting valley -polarized quantum spin Hall insulators in which AVHE and quantum spin Hall effect are synergized in a single system. Our findings reveal a route to achieve multiple Hall effects in two-dimensional tetragonal AFM monolayers.