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arXiv 1003.0276cond-mat.mes-hallcond-mat.other
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InGaAs/InAlAs二维电子气直接带间跃迁产生的磁电光电流

Magneto-electric photocurrent generated by direct inter-band transitions in InGaAs/InAlAs two-dimensional electron gas

Junfeng Dai, Hai-Zhou Lu, C. L. Yang, Shun-Qing Shen, Fu-Chun Zhang, Xiaodong Cui

摘要:

本文报道了线偏振入射光激发InGaAs/InAlAs二维电子气时,通过带间直接跃迁产生的磁电光电流,该电流与面内磁场成正比,面内磁场使自旋相反的光激发载流子的速度不平衡,从而由自旋光电流产生电流。所观察到的光的偏振依赖性的电流解释微观考虑到在波矢量空间中的光激发载流子密度的各向异性。可以从测量的电流中提取自旋光电流,并且估计自旋光电流到电流的转换系数为$10^{-3}$ $\sim$ $10^{-2}$/特斯拉。

英文摘要:

We report observation of magneto-electric photocurrent generated via direct inter-band transitions in an InGaAs/InAlAs two-dimensional electron gas excited by a linearly polarized incident light.The electric current is proportional to the in-plane magnetic field which unbalances the velocities of the photoexcited carriers with opposite spins and consequently generates electric current from a spin photocurrent. The observed light polarization dependence of the electric current is explained microscopically by taking into account of the anisotropy of the photoexcited carrier density in wave vector space. The spin photocurrent can be extracted from the measured current and the conversion coefficient of spin photocurrent to electric current is estimated to be $10^{-3}$$\sim$$10^{-2}$ per Tesla.

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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