The electron-nuclei hyperfine interaction of electrons in indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment has been experimentally studied by measuring the polarization degree of the photoluminescence in a transverse magnetic field (Hanle effect) and the polarization recovery in a longitudinal magnetic field. The different symmetry of the $X$ valley electron Bloch amplitudes at the As, In, and Al nuclei strongly affects the hyperfine interaction. The hyperfine constants corresponding to these nuclei have been determined.

中文翻译：

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（In，Al）As / AlAs量子点X谷中的电子核相互作用

通过测量横向磁场中光致发光的极化程度（Hanle效应）和在垂直带隙（In，Al）As / AlAs量子点中具有I型能带取向的电子的电子核超精细相互作用进行了实验研究在纵向磁场中的极化恢复。不同的对称性$X$在As，In和Al原子核处的谷电子Bloch振幅强烈影响超精细相互作用。已经确定了与这些核相对应的超精细常数。