First principles prediction of the valley Hall effect in ScBrCl monolayer  

作　　者：Xiang Yu Ping Li Chang-Wen Zhang 于翔;李萍;张昌文

机构地区：[1]School of Physics and Technology,Institute of Spintronics,University of Jinan,Jinan 250022,China

出　　处：《Chinese Physics B》2025年第4期544-550,共7页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.52173283).

摘　　要：Two-dimensional(2D)ferrovalley materials with valley-dependent Hall effect have attracted great interest due to their significant applications in spintronics.In this paper,by using first-principles computational simulations,we predict that the ScBrCl monolayer is a 2D ferrovalley material with valley-dependent multiple Hall effects.After calculations,we found that the ScBrCl monolayer has excellent thermodynamic stability and kinetic stability,and has a high magnetic transition temperature.When the magnetization direction is turned from in-plane to out-of-plane,a large valley polarization of 44 meV can be generated.In particular,under 5.1%–5.3%tensile strain conditions,ScBrCl monolayer can achieve quantum anomalous Hall effect,and further prove its existence through non-zero Chern number and non-trivial edge state.Our discovery enriches the research on valley-dependent Hall effect and promotes the potential application of 2D Janus monolayer in valley electronics.

关 键 词：valley polarization valley-dependent Hall effect band structure SPINTRONICS 

分 类 号：O469[理学—凝聚态物理]