Spin-dependent electron-impurity scattering in two-dimensional electron systems
WoS ID: 000262246400009
Scopus ID: 58549105577
We present a theoretical study of elastic spin-dependent electron scattering caused by a charged impurity in the vicinity of a two-dimensional electron gas. We find that the symmetry properties of the spin-dependent differential scattering cross section are different for an impurity located in the plane of the electron gas and for one at a finite distance from the plane. We show that in the latter case asymmetric ("skew") scattering can arise if the polarization of the incident electron has a finite projection on the plane spanned by the normal vector of the two-dimensional electron gas and the initial propagation direction. In specially prepared samples this scattering mechanism may give rise to a Hall-type effect in the presence of an in-plane magnetic field.