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

ABSTRACT: The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of the global crystal space group has limited the search for spintronics materials mainly to non-centrosymmetric materials. In recent times it has been suggested that spin polarization originates fundamentally from local atomic site asymmetries and therefore centrosymmetric materials may exhibit previously overlooked spin polarizations. Here, by using spin- and angle-resolved photoemission spectroscopy, we report the observation of helical spin texture in monolayer, centrosymmetric and semiconducting PtSe₂ film without the characteristic spin splitting in conventional Rashba effect (R-1). First-principles calculations and effective analytical model analysis suggest local dipole

SUBMITTER: Yao W 

PROVIDER: S-EPMC5290424 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature