Spin Hall and spin-diagonal conductivity in the presence of Rashba and Dresselhaus spin-orbit coupling
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We investigate the spin-current linear response conductivity tensor to an electric field in a paramagnetic two-dimensional electron gas with both Rashba and Dresselhaus spin-orbit coupling in the weak scattering regime within the Born approximation. In the usual sample parameters, and for cross-sectional size smaller than the spin-coherence length, the spin-Hall conductivity depends only on the sign of the difference in magnitude of the Rashba and Dresselhaus coupling except within a narrow window where both coupling strengths are equal. We also find that a spin current is generated in the direction of the driving field for a nonzero Dresselhaus term. Possible experimental setups for its detection, taking into account the finite mobility and typical parameters of current samples, are discussed.
author list (cited authors)
Sinitsyn, N. A., Hankiewicz, E. M., Teizer, W., & Sinova, J.
complete list of authors
Sinitsyn, NA||Hankiewicz, EM||Teizer, W||Sinova, J