摘要
We propose a scheme for realizing the spin direction-dependent quantum anomalous Hall effect(QAHE)driven by spin-orbit couplings(SOC)in two-dimensional(2D)materials.Based on the sp^(3)tight-binding(TB)model,we find that these systems can exhibit a QAHE with out-of-plane and in-plane magnetization for the weak and strong SOC,respectively,in which the mechanism of quantum transition is mainly driven by the band inversion of p_(x,y)/p_(z)orbitals.As a concrete example,based on first-principles calculations,we realize a real material of monolayer 1T-SnN_(2)/PbN_(2)exhibiting the QAHE with in-plane/out-of-plane magnetization characterized by the nonzero Chern number C and topological edge states.These findings provide useful guidance for the pursuit of a spin direction-dependent QAHE and hence stimulate immediate experimental interest.
作者
杨宇贤
张昌文
Yu-Xian Yang;Chang-Wen Zhang†(School of Physics and Technology,University of Jinan,Jinan 250022,China)
基金
Project supported by Taishan Scholar Program of Shandong Province (Grant No.ts20190939)
Independent Cultivation Program of Innovation Team of Jinan City (Grant No.2021GXRC043)
the National Natural Science Foundation of China (Grant No.52173283)。
作者简介
Corresponding author:张昌文.E-mail:ss zhangchw@ujn.edu.cn。
