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.
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).
