Theory of Spin-Charge Coupled Transport in a Two-Dimensional Electron Gas with Rashba Spin-Orbit Interactions

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  • 13 November 2003
Abstract
We derive a set of equations that provide a complete description of coupled spin and charge diffusive transport in a two-dimensional electron gas (2DEG) with Rashba spin-orbit (SO) interactions. These equations capture a number of interrelated effects including spin accumulation and diffusion, Dyakonov-Perel spin relaxation, magnetoelectric and spin-galvanic effects, and the spin-Hall effect. They can be used to model transport and optical experiments in 2DEG systems involving spin injection and spin-selective contacts. Our derivation in based on a microscopic evaluation of the density-matrix response function of a disordered 2DEG with SO interactions.

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