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arXiv 1111.1197cond-mat.mes-hallcond-mat.mtrl-sci
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非均匀Rashba型自旋轨道场诱导的自旋流

Spin Currents Induced by Nonuniform Rashba-Type Spin-Orbit Field

Kazuhiro Tsutsui, Akihito Takeuchi, Gen Tatara, Shuichi Murakami

摘要:

本文利用Keldysh格林函数方法研究了非均匀自旋轨道耦合的铁磁金属中的自旋弛豫力矩。在非磁体中,当自旋-轨道耦合不均匀时,弛豫力矩出现。在没有外场的情况下,弛豫力矩诱导的自旋电流与Rashba型自旋轨道场(RSOF)的矢量手征成正比。在外场的存在下,另一方面,自旋弛豫力矩产生于外场和矢量手征的耦合的SROF。我们的结果表明,自旋阱或源效应的控制,通过设计的结中的SSOF。

英文摘要:

We study the spin relaxation torque in nonmagnetic or ferromagnetic metals with nonuniform spin-orbit coupling within the Keldysh Green's function formalism. In non-magnet, the relaxation torque is shown to arise when the spin-orbit coupling is not uniform. In the absence of an external field, the spin current induced by the relaxation torque is proportional to the vector chirality of Rashba-type spin-orbit field (RSOF). In the presence of an external field, on the other hand, spin relaxation torque arises from the coupling of the external field and vector chirality of RSOF. Our result indicates that spin-sink or source effects are controlled by designing RSOF in junctions.

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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