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arXiv 0903.0920cond-mat.mes-hall
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抛物型GaAs/AlGaAs量子阱中的门控自旋轨道相互作用

Gate-controlled spin-orbit interaction in a parabolic GaAs/AlGaAs quantum well

M. Studer, G. Salis, K. Ensslin, D. C. Driscoll, A. C. Gossard

摘要:

我们研究的自旋-轨道相互作用的可调谐性在一个二维电子气的前,背栅电极通过监测漂移电子的自旋进动频率使用时间分辨克尔旋转。Rashba自旋分裂可以通过门偏置来调节,而我们发现一个小的Dresselhaus分裂,它仅弱依赖于门。我们确定的两个组件的绝对值和符号,并表明零Rashba自旋分裂的各向异性的自旋退相率消失。

英文摘要:

We study the tunability of the spin-orbit interaction in a two-dimensional electron gas with a front and a back gate electrode by monitoring the spin precession frequency of drifting electrons using time-resolved Kerr rotation. The Rashba spin splitting can be tuned by the gate biases, while we find a small Dresselhaus splitting that depends only weakly on the gating. We determine the absolute values and signs of the two components and show that for zero Rashba spin splitting the anisotropy of the spin-dephasing rate vanishes.

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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