Spin dynamics of hot excitons in diluted magnetic semiconductors with spin-orbit interaction
Spin dynamics of hot excitons in diluted magnetic semiconductors with spin-orbit interaction
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DOI：
10.1103/physrevb.100.045306
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发表时间：
2019-05
影响因子：
3.7
通讯作者：
F. Ungar;P. I. Tamborenea;V. M. Axt
中科院分区：
文献类型：
--
作者：
F. Ungar;P. I. Tamborenea;V. M. Axt
研究了导带中Rashba型自旋轨道相互作用对稀磁半导体量子威尔斯阱中热激子自旋动力学的影响。在具有强自旋轨道耦合的材料中，我们确定了自旋轨道效应大大加速自旋衰减的参数制度，甚至以阻尼振荡的形式定性地改变动力学。此外，我们表明，应用一个小的外部磁场可以用来减轻自旋轨道耦合的影响或完全消除其影响的领域以上的材料依赖的阈值。
We explore the impact of a Rashba-type spin-orbit interaction in the conduction band on the spin dynamics of hot excitons in diluted magnetic semiconductor quantum wells. In materials with strong spin-orbit coupling, we identify parameter regimes where spin-orbit effects greatly accelerate the spin decay and even change the dynamics qualitatively in the form of damped oscillations. Furthermore, we show that the application of a small external magnetic field can be used to either mitigate the influence of spin-orbit coupling or entirely remove its effects for fields above a material-dependent threshold.