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

摘要

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(Z0)and spin-flip scattering(Zf)considered, but also the interfacial Rashba spin-orbit coupling scattering(ZRSOC), 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 thatGwas suppressed with increasingZ0, as expected. Interestingly, a particular value ofZfcan causeGandPto reach a maximum value. In particular,ZRSOCplays a crucial role to reduceGandPin the metallic limit, but its influence on the tunneling limit was quite weak. On the other hand, the effect ofZRSOCwas diminished in the tunneling limit of the magnetic junction.