Research
Articles
Spin-polarization-induced anisotropic magnetoresistance in a two dimensional Rashba system
Category : International Journal Editor : 최원영(M),김형준,장준연,고경춘,이경진,구현철(C) Published Date : 2017.04 Publications : Current applied physics
In an asymmetric two-dimensional electron gas system, the Rashba effective field arises due to the intrinsic electric field. Even without ferromagnetism, the Rashba spin splitting acts as a source of spin polarization and affects the transport property of the two-dimensional electron channel. In this Rashba channel, the magnetoresistance is determined by the vector alignment between the applied field and the bias current. In addition, the channel resistance for the parallel alignment between the applied field and the Rashba field is much smaller than that for the antiparallel alignment between them, which surprisingly agrees with the spin polarization induced by the Edelstein effect. This anisotropic magnetoresistance also allows us to estimate the spin polarization in a two-dimensional quantum well channel.
