Karwacki L., Dyrdal A., Berakdar J., and Barnas J.

Using the Matsubara Green?s function formalism, we calculate the temperature dependence of the nonequilibrium spin polarization induced by an external electric field in the presence of spin-orbit coupling. The model Hamiltonian includes an isotropic k-cubed form of the Rashba spin-orbit interaction. Such a Hamiltonian captures the electronic and the spin properties of a two-dimensional electron (hole) gas at the surfaces or interfaces of transition metal oxides or in p-doped semiconductor heterostructures. The induced spin polarization is calculated for the nonmagnetic as well as for a magnetic electron/hole gas. Relations of the spin polarization to the Berry curvature is also discussed.

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