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arXiv 1502.00476cond-mat.mes-hall
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介观自旋轨道耦合系统中的自旋极化理论

Theory of spin polarization in mesoscopic spin-orbit coupling systems

Shi-Dong Liang, Guang-Yao Huang

摘要:

建立了介观铁磁和自旋轨道相互作用(SOI)半导体系统的体自旋极化(BSP)和基于电流的自旋极化(CSP)的一般形式。在此基础上,揭示了BSP和CSP的基本性质及其相互关系。BSP描述了器件的内在自旋极化特性。CSP既取决于器件的本征参数,也取决于入射电流。对于非自旋极化且具有同相自旋相干性的入射电流,CSP等于BSP。给出了铁磁纳米线、Rashba纳米线和圆环等几种典型纳米器件模型的BSP和CSP的解析表达式。这些结果提供了BSP和CSP的基本物理行为及其相互关系。

英文摘要:

We establish a general formalism of the bulk spin polarization (BSP) and the current-based spin polarization (CSP) for mesoscopic ferromagnetic and spin-orbit interaction (SOI) semiconducting systems. Based on this formalism, we reveal the basic properties of BSP and CSP and their relationships. The BSP describes the intrinsic spin polarized properties of devices. The CSP depends on both intrinsic parameters of device and the incident current. For the non-spin-polarized incident current with the inphase spin-phase coherence, CSP equals to BSP. We give analytically the BSP and CSP of several typical nanodevice models, ferromagnetic nanowire, Rashba nanowire and rings. These results provide basic physical behaviors of BSP and CSP and their relationships.

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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