Spin-Hall transport in a two-dimensional electron system with
magnetic impurities |
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Authors: | P Liu S-J Xiong |
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Institution: | (1) National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China |
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Abstract: | 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. |
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Keywords: | 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 |
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