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arXiv 1107.2585cond-mat.mtrl-sci
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硅中逆自旋霍尔效应的观测

Observation of the inverse spin Hall effect in silicon

Kazuya Ando, Eiji Saitoh

摘要:

固体中的自旋-轨道相互作用将电子的自旋与其动量耦合起来。这种耦合引起自旋电流和电荷电流之间的相互转换:直接和反向自旋霍尔效应。自旋霍尔效应已在金属和半导体中观察到。然而,在最基本的半导体之一硅中尚未实现自旋/电荷转换,其中由于其非常弱的自旋-轨道相互作用,认为难以获得自旋霍尔效应。本文报道了室温下在硅中观察到的逆自旋霍尔效应。对于p型硅膜,自旋/电荷电流转换效率(自旋霍尔角)为0.0001。尽管自旋霍尔角很小,但我们在p-Si膜中发现了由于逆自旋霍尔效应而产生的清晰的电压,这表明硅可以用作自旋电流检测器。

英文摘要:

The spin-orbit interaction in a solid couples the spin of an electron to its momentum. This coupling gives rise to mutual conversion between spin and charge currents: the direct and inverse spin Hall effects. The spin Hall effects have been observed in metals and semiconductors. However, the spin/charge conversion has not been realized in one of the most fundamental semiconductors, silicon, where accessing the spin Hall effects has been believed to be difficult because of its very weak spin-orbit interaction. Here we report observation of the inverse spin Hall effect in silicon at room temperature. The spin/charge current conversion efficiency, the spin Hall angle, is obtained as 0.0001 for a p-type silicon film. In spite of the small spin Hall angle, we found a clear electric voltage due to the inverse spin Hall effect in the p-Si film, demonstrating that silicon can be used as a spin-current detector.

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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