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arXiv 0707.2197cond-mat.mes-hall
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Rashba介质中平衡自旋流的力学测量

Mechanical measurement of equilibrium spin currents in the Rashba medium

E. B. Sonin

摘要:

我们证明,具有Rashba自旋轨道相互作用(Rashba介质)的2D电子气中的平衡自旋电流会在介质边缘附近的衬底上产生机械扭矩。如果衬底是悬臂,则机械扭矩使悬臂的自由端移位。这种效应可以通过磁场来增强和调节。对这种位移的观测将是证明平衡自旋流存在的一种有效方法。对Rashba介质边缘的分析证明了局域边缘态的存在。它们形成了一个一维连续的状态。这暗示了一种新型的量子线:自旋轨道量子线。

英文摘要:

We demonstrate that an equilibrium spin current in a 2D electron gas with Rashba spin-orbit interaction (Rashba medium) results in a mechanical torque on a substrate near an edge of the medium. If the substrate is a cantilever, the mechanical torque displaces the free end of the cantilever. The effect can be enhanced and tuned by a magnetic field. Observation of this displacement would be an effective method to prove existence of equilibrium spin currents. The analysis of edges of the Rashba medium demonstrates the existence of localized edge states. They form a 1D continuum of states. This suggests a new type of quantum wire: spin-orbit quantum wire.

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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