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Magneto-Spectroscopy of Two-Dimensional Systems: Many- and Few-Body Effects

机译:二维系统的磁谱:多体效应和很少体效应

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摘要

We present a classification of states and exact optical selection rules for charged electron-hole (e-h) complexes in magnetic fields that follow from magnetic translations and axial symmetry. A possibility to observe photoluminescence of dark X{sup}- states in angle-resolved experiments is discussed. The effect of excess electrons on internal transitions of negatively charged excitons X{sup}- in GaAs quantum wells is studied theoretically and experimentally (by optically detected resonance (ODR) spectroscopy). An experimentally observed blue shift with excess electron density is explained in terms of collective excitations-magnetoplasmons bound to a mobile valence band hole.
机译:我们提供了状态的分类和磁场中带电电子-空穴(e-h)络合物的精确光学选择规则,这些磁场源自磁平移和轴向对称性。讨论了在角度分辨实验中观察暗X {sup}-态光致发光的可能性。从理论和实验上(通过光学检测共振(ODR)光谱)研究了过量电子对GaAs量子阱中带负电的激子X {sup}-的内部跃迁的影响。实验中观察到的具有过量电子密度的蓝移是根据与激发价带孔结合的集体激发-磁等离子体激元解释的。

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