Enhanced valley splitting of WSe_(2)in twisted van der Waals WSe_(2)/CrI_(3)heterostructures  

作　　者：Mei Ge Han Wang Jizheng Wu Chen Si Junfeng Zhang Shengbai Zhang 

机构地区：[1]School of Physics and Information Engineering,Shanxi Normal University,Taiyuan,China [2]Chemical Sciences Division,Lawrence Berkeley National Laboratory,Berkeley,CA,USA [3]School of Materials Science and Engineering,Beihang University,Beijing,China [4]Department of Physics,Applied Physics,and Astronomy,Rensselaer Polytechnic Institute,Troy,NY,USA

出　　处：《npj Computational Materials》2022年第1期277-283,共7页计算材料学（英文）

基　　金：Work in China was supported by the National Natural Science Foundation of China(12074235);S.Z.acknowledges the support by the U.S.Department of Energy(DOE)under Grant no.DESC0002623;C.S.also acknowledges support by the open research fund program of the state key laboratory of low dimensional quantum physics(KF202103).

摘　　要：Van der Waals(vdW)heterostructures composed of different two-dimensional(2D)materials offer an easily accessible way to combine properties of individual materials for applications.Owing to the discovery of a set of unanticipated physical phenomena,the twisted 2D vdW heterostructures have gained considerable attention recently.Here,we report enhanced valley splitting in twisted 2D vdW WSe_(2)/CrI_(3)heterostructures.In particular,the splitting can be 1200%(or 5.18 meV)of the value for a non-twisted heterostructure.According to the k·p model,this value is equivalent to a~20 T external magnetic field applied perpendicular to the 2D sheet.The thermodynamic stability of 2D vdW WSe_(2)/CrI_(3)heterostructures,on the other hand,depends linearly on the interlayer twisting angle.

关 键 词：TWISTED SPLITTING gained 

分 类 号：O15[理学—数学]