Volume 88, Number 2, October 2009
Article Number 27005
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 03 November 2009
EPL, 88 (2009) 27005
DOI: 10.1209/0295-5075/88/27005

Nonvanishing anisotropic magnetoresistance in Rashba two-dimensional electron systems with nonmagnetic disorders

C. M. Wang and M. Q. Pang

School of Physics and Electrical Engineering, Anyang Normal University - Anyang 455000, China

received 5 July 2009; accepted in final form 5 October 2009; published October 2009
published online 3 November 2009

We study anisotropic magnetoresistance (AMR) in a spin-polarized two-dimensional electron gas with Rashba spin-orbit coupling and nonmagnetic disorder collision. We show that AMR exists, arising from the combined effect of in-plane magnetization, spin-orbit coupling, and nonmagnetic remote disorder scattering. Further, numerical evaluation demonstrates that the smoothness of the remote disorder can strongly affect AMR, and this AMR is sensitive to the electron density. A large magnitude of AMR ($\approx$ 24%) is obtained for low-density systems with strong spin-orbit splitting.

73.43.Qt - Magnetoresistance.
72.25.Dc - Spin polarized transport in semiconductors.
71.70.Ej - Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect.

© EPLA 2009