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HL: Halbleiterphysik

HL 13: Spin controlled transport I

HL 13.3: Vortrag

Dienstag, 28. März 2006, 11:30–11:45, BEY 118

Polarized Electric Current in Semiclassical Transport with Spin-Orbit Interaction — •P.G. Silvestrov¹ and E.G. Mishchenko² — ¹Theoretische Physik III, Ruhr-Universitt Bochum, 44780 Bochum, Germany — ²Department of Physics, University of Utah, Salt Lake City, UT 84112, USA

Semiclassical solutions of two-dimensional Schrödinger equation with spin-orbit interaction and smooth potential are considered. In the leading order, spin polarization is in-plane and follows the evolution of the electron momentum for a given subband. Out-of-plane spin polarization appears as a quantum correction, for which an explicit expression is obtained. We demonstrate how spin-polarized currents can be achieved with the help of a barrier or quantum point contact open for transmission only in the lower subband.