Spin-Hall transport in a two-dimensional electron system with magnetic impurities
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China
Corresponding author: a email@example.com
Revised: 17 March 2006
Published online: 14 June 2006
The spin Hall transport properties in a two-dimensional electron system with both Rashba spin-orbit coupling (SOC) and magnetic impurities are investigated. Electrons are scattered by impurities through an exchange interaction that leads to spin flip-flop processes and so changes the spin Hall effect induced by the SOC. The spin Hall conductance is calculated in a 4-terminal system using the Landauer-Buttiker formula and Green function approach. In comparison with the simulation results on nonmagnetic impurities doping systems, our results reveal that the spin Hall conductance is still nonzero in a system with a large density of magnetic impurities and a finite intensity of the exchange interaction between the electrons and impurities, and its sign may be altered when the doping density and interaction strength are large enough.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006