Spin-charge coupling effects in a two-dimensional electron gas
arXiv:1611.07210
Abstract
In these lecture notes we study the disordered two-dimensional electron gas in the presence of Rashba spin-orbit coupling, by using the Keldysh non-equilibrium Green function technique. We describe the effects of the spin-orbit coupling in terms of a SU(2) gauge field and derive a generalized Boltzmann equation for the charge and spin distribution functions. We then apply the formalism to discuss the spin Hall and the inverse spin galvanic (Edelstein) effects. Successively we show how to include, within the generalized Boltzmann equation, the side jump, the skew scattering and the spin current swapping processes originating from the extrinsic spin-orbit coupling due to impurity scattering.
arXiv comment30 pages, 4 figures, Book chapter to be published by World Scientific in the Proceedings of "The Twelfth International School on Theoretical Physics Symmetry and Structural Properties of Condensed Matter" Poland, Rzeszów, September, 5-10th 2016
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