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arXiv 0910.0486cond-mat.mes-hallcond-mat.quant-gas
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二维电子气自旋输运的规范场理论研究

Gauge field theory approach to spin transport in a 2D electron gas

B. Berche, N. Bolivar, A. Lopez, E. Medina

摘要:

我们讨论了在U(1)× SU(2)规范理论解释中包含自旋-轨道相互作用的泡利哈密顿量,其中规范对称性似乎是破缺的。这种解释提供了新的见解的问题,在凝聚态环境中的自旋电流,并可以扩展到Rashba和Dresselhaus自旋轨道相互作用。我们提出了几个结果,目前的配方:i)它自动导致零自旋电导率,与规范对称处理的预测相反,ii)拓扑量子化条件导致电压量子化如下,和iii)自旋干涉仪可以设想,其中,从任意传入的非极化旋量开始,总是可以构造一个完美的自旋过滤条件。

英文摘要:

We discuss the Pauli Hamiltonian including the spin-orbit interaction within an U(1) x SU(2) gauge theory interpretation, where the gauge symmetry appears to be broken. This interpretation offers new insight into the problem of spin currents in the condensed matter environment, and can be extended to Rashba and Dresselhaus spin-orbit interactions. We present a few outcomes of the present formulation: i) it automatically leads to zero spin conductivity, in contrast to predictions of Gauge symmetric treatments, ii) a topological quantization condition leading to voltage quantization follows, and iii) spin interferometers can be conceived in which, starting from a arbitrary incoming unpolarized spinor, it is always possible to construct a perfect spin filtering condition.

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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