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arXiv 0802.1097cond-mat.mes-hall
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具有Rashba效应的金属-半导体异质结的隧穿电导

Tunneling conductance of a metal-semiconductor heterostructure with Rashba effect

B Srisongmuang, P Pairor, M Berciu

摘要:

本文从理论上研究了具有Rashba自旋轨道耦合的金属-半导体混合结构的面内隧穿谱。我们发现电导谱中两个不同特征之间的能量间隔可以用来测量半导体的Rashba能量。我们还考虑了改变界面处自旋守恒和自旋翻转散射的概率对整体电导的影响。令人惊讶的是,在某些条件下,界面散射概率的增加实际上可以导致电导增加。特别地,在隧穿机制中,自旋翻转散射概率的增加增强了电导。研究还发现,界面散射对金属电导的自旋极化有很大影响,而对半导体电导的自旋极化影响不大。

英文摘要:

We theoretically studied the in-plane tunneling spectroscopy of the hybrid structure composed of a metal and a semiconductor with Rashba spin-orbit coupling. We found that the energy spacing between two distinct features in the conductance spectrum can be used to measure the Rashba energy of the semiconductor. We also considered the effect that varying the probability of spin-conserving and spin-flip scattering at the interface has on the overall conductance. Surprisingly, an increase in interface scattering probability can actually result in increased conductance under certain conditions. Particularly, in the tunneling regime, an increase in spin-flip scattering probability enhances the conductance. It is also found that the interfacial scattering greatly affects the spin polarization of the conductance in metal, but hardly affects that in the semiconductor.

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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