Relation between spin current and spin torque in Rashba ferromagnets

Abstract

We establish a brief relation between spin current and spin torque, including spin–orbit torque and spin transfer torque in 2D Rashba ferromagnets with nonuniform magnetic texture. Both electrically and thermally induced charge, heat, and spin current are investigated by the Luttinger’s mechanical method, and we derive the contributions of magnetization corresponding to the thermal spin current and the thermal spin torque. The novel transport currents are also found in this paper when the interplay between spin–orbit coupling and nonuniform magnetic texture is taken into account.