铁磁二维电子气异质结的界面电流

In this paper ,we studied the transverse persistent charge current flowing at the interface of the FM/2DEG junction, the Rashba spin orbit interaction is considered in 2DEG lead. By using the quantum scattering method , we found that a nonzero transverse charge current flows along interface at the zero bias applied on the junction, and the current can affected by system parameters such as Fermi energy, spin orbit coupling constant, as well as the FM magnetization including its magnitude and direction.. When the magnetization is parallel to the interface, the charge current vanishes, whereas it arrives at the maximum as the magnetization of the FM electrode in the 2DEG plane and perpendicular to the interface. We have also studied the non-equilibrium case that the nonzero bias is applied on the junction, the transverse charge current was also found flowing at the interface but its magnitude is much larger than the equilibrium case due to the smearing effect, which is favorable to the experimental measurement.