Effect of asymmetric interface on charge and spin transport across two dimensional electron gas with Dresselhaus spin-orbit coupling/ferromagnet junction

We theoretically studied the effect of interfacial scattering on the transport of charge and spin across the junction of a two-dimensional electron gas with Dresselhaus spin-orbit coupling and ferromagnetic material junction, via the conductance (G) and the spin-polarization of the conductance spectra (P) using the scattering method. At the interface, not only were the effects of spin-conserving (Z(0)) and spin-flip scattering (Z(f)) considered, but also the interfacial Rashba spin-orbit coupling scattering (Z(RSOC)), which was caused by the asymmetry of the interface, was taken into account, and all of them were modeled by the delta potential. It was found that G was suppressed with increasing Z(0), as expected. Interestingly, a particular value of Z(f) can cause G and P to reach a maximum value. In particular, Z(RSOC) plays a crucial role to reduce G and P in the metallic limit, but its influence on the tunneling limit was quite weak. On the other hand, the effect of Z(RSOC) was diminished in the tunneling limit of the magnetic junction. (C) 2017 Elsevier B.V. All rights reserved.