Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe2 film

Abstract

Spin polarization in non-magnetic solids has mainly been limited to non-centrosymmetric materials. Here, the authors identify a helical spin texture in the centrosymmetric semiconductor platinum diselenide, and suggest it arises from a local dipole induced Rashba effect rather than the usual spin-splitting.