Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 34: Spin controlled transport II

HL 34.8: Talk

Wednesday, March 25, 2009, 16:15–16:30, BEY 118

Spin-dependent electron-impurity scattering in two-dimensional electron systems — •Andras Palyi — Department of Physics, University of Konstanz, 78457 Konstanz, Germany

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-like effect in the presence of an in-plane magnetic field.