Tang C G, Chen Y H, Liu Y, Wang Z G
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083, People's Republic of China.
J Phys Condens Matter. 2009 Sep 16;21(37):375802. doi: 10.1088/0953-8984/21/37/375802. Epub 2009 Aug 21.
We have studied the circular photogalvanic effect (CPGE) in a GaAs/AlGaAs two-dimensional electron gas excited by near infrared light at room temperature. The anomalous CPGE observed under normal incidence indicates a swirling current which is realized by a radial spin current via the reciprocal spin-Hall effect. The anomalous CPGE exhibits a cubic cosine dependence on the incidence angle, which is discussed in line with the above interpretation.
我们研究了室温下近红外光激发的GaAs/AlGaAs二维电子气中的圆光电流效应（CPGE）。在垂直入射下观察到的异常CPGE表明存在一个涡旋电流，该电流是通过互易自旋霍尔效应由径向自旋电流实现的。异常CPGE对入射角呈现三次余弦依赖关系，这与上述解释一致进行了讨论。
