Transverse electric current induced by optically injected spin current in a cross-shaped InGaAs∕InAlAs system
Transverse electric current induced by optically injected spin current in a cross-shaped InGaAs∕InAlAs system
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DOI：
10.1063/1.2196230
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发表时间：
2005-11
影响因子：
4
通讯作者：
Jian Li;X. Dai;S. Shen;Fu-Chun Zhang
中科院分区：
文献类型：
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作者：
Jian Li;X. Dai;S. Shen;Fu-Chun Zhang
我们研究了线偏振光照射在具有结构反转不对称性的准二维InGaAs闪烁InAlAs系统上的电响应。由于Rashba自旋轨道相互作用，光激发的传导电子携带具有面内自旋极化的纯自旋电流。我们使用的Landauer-Buttiker形式主义表明，这种自旋电流感应两个向内或向外的横向电荷流，这是在实验中观察到的。这种效应可以作为某些类型的自旋电流的实验探针。
We examine the electric response of a linearly polarized light normally shed on a cross-shaped quasi-two-dimensional InGaAs∕InAlAs system with structure inversion asymmetry. The photoexcited conduction electrons carry a pure spin current with in-plane spin polarization due to the Rashba spin-orbit interaction. We use the Landauer-Buttiker formalism to show that this spin current induces two inward or outward transverse charge currents, which are observable in experiments. This effect may serve as an experimental probe of certain types of spin current.