Controllable Valley Polarization and Strain Modulation in 2D 2H-VS₂/CuInP₂Se₆ Heterostructures.

ABSTRACT: Two-dimensional (2D) transition metal dichalcogenides endow individually addressable valleys in momentum space at the K and K' points in the first Brillouin zone due to the breaking of inversion symmetry and the effect of spin-orbit coupling. However, the application of 2H-VS₂ monolayer in valleytronics is limited due to the valence band maximum (VBM) located at the Γ point. Here, by involving the 2D ferroelectric (FE) CuInP₂Se₆ (CIPSe), the ferrovalley polarization, electronic structure, and magnetic properties of 2D 2H-VS₂/CIPSe heterostructures with different stacking patterns and FE polarizations have been investigated by using first-principles calculations. It is found that, for the energetically favorable AB-stacking pattern, the valley pol

SUBMITTER: Yang F 

PROVIDER: S-EPMC9315968 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature