Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces

摘要

Using the Matsubara Green's function formalism we calculate the temperaturedependence of the nonequilibrium spin polarization induced by an externalelectric field in the presence of spin-orbit coupling. The model Hamiltonianincludes an isotropic k-cubed form of the Rashba spin-orbit interaction. Such aHamiltonian captures the electronic and spin properties of two-dimensionalelectron (hole) gas at the surfaces or interfaces of transition metal oxides orin p-doped semiconductor heterostructures. The induced spin polarization iscalculated for the nonmagnetic as well as magnetic electron/hole gas. Relationof the spin polarization to the Berry curvature is also discussed.