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arXiv 0708.0455cond-mat.mes-hall
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自旋霍尔效应中自旋扩散介导的非局域电荷输运

Nonlocal Charge Transport Mediated by Spin Diffusion in the Spin-Hall Effect Regime

D. A. Abanin, A. V. Shytov, L. S. Levitov, B. I. Halperin

摘要:

在自旋霍尔制度,导致自旋扩散介导的电荷传导的非局部电响应,预测。自旋介导的输运由于其长程特性而突出,并且可以对非局部阻力做出主导贡献。由自旋扩散长度设定的非定域性的特征范围可以足够大,以允许在诸如GaAs的材料中检测这种效应,尽管其幅度很小。通过跨阻对外部磁场的特征非单调依赖性,表现出符号变化和衰减,促进了检测。

英文摘要:

A nonlocal electric response in the spin-Hall regime, resulting from spin diffusion mediating charge conduction, is predicted. The spin-mediated transport stands out due to its long-range character, and can give dominant contribution to nonlocal resistance. The characteristic range of nonlocality, set by the spin diffusion length, can be large enough to allow detection of this effect in materials such as GaAs despite its small magnitude. The detection is facilitated by a characteristic nonmonotonic dependence of transresistance on the external magnetic field, exhibiting sign changes and decay.

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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