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arXiv 1402.3868cond-mat.mes-hall
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Rashba自旋轨道耦合和磁场对多边形量子环的影响

Effects of Rashba spin-orbit coupling and a magnetic field on a polygonal quantum ring

Han-Zhao Tang, Li-Xue Zhai, Man Shen, Jian-Jun Liu

摘要:

利用标准量子网络方法,研究了Rashba自旋轨道耦合(RSOC)和外加磁场对多边形量子环自旋输运性质的影响。利用Landauer-Buttiker公式,我们发现透射电子的极化方向和相位可以由磁场和RSOC共同控制。讨论了一种在任意边数的多边形中产生自旋极化电导的器件。该器件将允许精确控制自旋,并简单地通过交换源极和漏极来选择性地提供自旋过滤,以用于上自旋或下自旋。

英文摘要:

Using standard quantum network method, we analytically investigate the effect of Rashba spin-orbit coupling (RSOC) and a magnetic field on the spin transport properties of a polygonal quantum ring. Using Landauer-Buttiker formula, we have found that the polarization direction and phase of transmitted electrons can be controlled by both the magnetic field and RSOC. A device to generate a spin-polarized conductance in a polygon with an arbitrary number of sides is discussed. This device would permit precise control of spin and selectively provide spin filtering for either spin up or spin down simply by interchanging the source and drain.

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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