Dresden 2006 – wissenschaftliches Programm

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SYMS: Magnetic Switching

SYMS 2: Magnetic Switching II

SYMS 2.1: Hauptvortrag

Montag, 27. März 2006, 17:00–17:20, HSZ 04

Spin-Hall effect in a two-dimensional electron system — •Peter Schwab¹, Michael Dzierzawa¹, Roberto Raimondi², and Cosimo Gorini² — ¹Universität Augsburg, Germany — ²Università di Roma Tre, Italy

In a two-dimensional electron gas with spin-orbit coupling an electric field can generate spin currents and spin polarization. We study the problem using the method of quasiclassical Green’s functions. In the clean limit we establish a connection between the spin-Hall conductivity and a Berry phase in momentum space. For disordered systems we calculate spin currents and spin accumulation numerically for a strip connected to a voltage source. Universal spin currents are found in the short-time dynamics, leading to a spin-Hall spin polarization near the edges of the strip.