Spin-dependent electron-impurity scattering in two-dimensional electron systems

Details Spin-dependent electron-impurity scattering in two-dimensional electron systems Spin-dependent electron-impurity scattering in two-dimensional electron systems

2008-10-16

arxiv.org/abs/0810.2892v1

Phys. Rev. B 78, 241304(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4.1 pages, 2 figures

Scientific paper

10.1103/PhysRevB.78.241304

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 preparated samples this scattering mechanism may give rise to a Hall-like effect in the presence of an in-plane magnetic field.

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