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arXiv 0803.2390cond-mat.mes-hall
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具有自旋轨道相互作用的电子系统中的持续自旋流

Persistent spin currents in electron systems with spin-orbit interaction

Xiang Zhou, Cheng-Zheng Hu, Zhenyu Zhang, Ling Miao, Xia Wang

摘要:

本文研究了在绝对零度热力学平衡下具有自旋轨道相互作用的一维和二维电子系统中的持续自旋流。持续自旋流是与电子系统位形空间中的Berry相和电子场位形中的缠绕数有关的内禀自旋流。当系统位形的拓扑空间具有非平凡的第一同伦群时,系统中的持续自旋流可以是非零的,并且在弹道极限下不易被杂质散射破坏。Rashba发现的二维无限电子系统中的非零背景自旋流可以通过自旋轨道相互作用下的有限环面电子系统中的输运持续自旋流来实现。从这个意义上说,我们迎接了Rashba提出的挑战。

英文摘要:

We investigate the persistent spin currents in one- and two-dimensional electron systems with spin-orbit interaction in thermodynamics equilibrium at absolute zero temperature. The persistent spin current is the intrinsic one which is connected with the Berry phases in the configuration spaces of an electron system and winding numbers in the field configurations of electrons. When the topological space of the configuration of a system has the nontrivial first homotopy groups, the persistent spin currents in the system could be nonzero and not easily destroyed by impurity scattering in ballistic limit. The non-vanishing background spin currents in infinite two-dimensional electron system found by Rashba could be realized by the transport persistent spin currents in a finite torus electron system with spin-orbit interaction. In this sense, we meet the challenge proposed by Rashba.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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