Spin transfer torque in the semiconductor/ferromagnetic structure in the presence of Rashba effect
Vahedi Javad, Satoory Sahar Ghasab
       

(color online) The sketch of the transverse and longitudinal components of spin-current density. In this figure, Q and Q spin currents that are Qxx and Qyx, respectively, are called the transverse components and Qz the longitudinal spin current component.