Spin Hall-effect in two-dimensional hopping systems -: art. no. 205327

被引:28
作者
Damker, T
Böttger, H
Bryksin, VV
机构
[1] Otto von Guericke Univ, Inst Theoret Phys, D-39016 Magdeburg, Germany
[2] AF Ioffe Phys Tech Inst, St Petersburg 19526, Russia
关键词
D O I
10.1103/PhysRevB.69.205327
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A two-dimensional hopping system with Rashba spin-orbit interaction is considered. Our main interest is concerned with the evolution of the spin degree of freedom of the electrons. We derive the rate equations governing the evolution of the charge density and spin polarization of this system in the Markovian limit in one-particle approximation. If only two-site hopping events are taken into account, the evolution of the charge density and of the spin polarization is found to be decoupled. A critical electric field is found, above which oscillations are superimposed on the temporal decay of the total polarization. A coupling between charge density and spin polarization occurs on the level of three-site hopping events. The coupling terms are identified as the anomalous Hall-effect and the recently proposed spin Hall-effect. Thus, an unpolarized charge current through a sheet of finite width leads to a transversal spin accumulation in our model system.
引用
收藏
页码:205327 / 1
页数:11
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