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arXiv 0910.4287cond-mat.mes-hall
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囚禁空穴的时间分辨Kerr旋转理论

Theory of the time-resolved Kerr rotation on trapped holes

Paweł Machnikowski, Tilmann Kuhn

摘要:

我们制定了半导体纳米结构中单个孔的时间分辨克尔旋转实验的模型(例如,量子点)上或在俘获空穴的集合上(例如,在量子阱中)在倾斜磁场中。我们使用一个通用的马尔可夫描述的孔和trion退相和专注于解释的时间分辨信号的微观演化的自旋极化。我们表明,在离面场的信号包含揭示自旋弛豫率和自旋相干退相率的组件。我们推导出解析公式的孔自旋极化,这可能是用来提取两个相关的速率通过拟合的测量数据。

英文摘要:

We formulate a model of the time-resolved Kerr rotation experiment on a single hole in a semiconductor nanostructure (e.g., a quantum dot) or on an ensemble of trapped holes (e.g., in a quantum well) in a tilted magnetic field. We use a generic Markovian description of the hole and trion dephasing and focus on the interpretation of the time-resolved signal in terms of the microscopic evolution of the spin polarization. We show that the signal in an off-plane field contains components that reveal both the spin relaxation rate and the spin coherence dephasing rate. We derive analytical formulas for the hole spin polarization, which may be used to extract the two relevant rates by fitting to the measurement data.

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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