Coupled valence band dispersions and the quantum defect of excitons in Cu2O
Coupled valence band dispersions and the quantum defect of excitons in Cu2O
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Cu2O 中激子的耦合价带色散和量子缺陷
DOI：
10.1088/0953-4075/49/13/134003
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Scheel
中科院分区：
文献类型：
--
作者：
F. Schöne;S. Krüger;P. Grünwald;M. Assmann;J. Heckötter;J. Thewes;H. Stolz;D. Fröhlich;M. Bayer;S. Scheel
最近关于氧化亚铜中高度激发的激子的高分辨率吸收光谱（Kazimierczuk等人，2014 Nature 514 343-347）已经揭示了它们的光谱与理想的类氢系列的显著偏差。在原子物理学中，离子核的影响和由此产生的库仑相互作用的修改通过引入量子亏损来解释。在这里，我们把这个概念的半导体物理领域，并显示如何在一组类似于原子中的量子缺陷的经验参数的晶体的复杂的能带色散是镜像。从高分辨率吸收光谱在电场中收集的实验数据使我们能够比较结果的多个角动量状态的黄色，甚至绿色激子系列的铜2 O。理论与实验之间的一致验证了我们将量子缺陷归因于能带色散的非抛物性。
Recent high-resolution absorption spectroscopy on highly excited excitons in cuprous oxide (Kazimierczuk et al 2014 Nature 514 343–347) have revealed significant deviations of their spectrum from the ideal hydrogen-like series. In atomic physics, the influence of the ionic core and the resulting modifications of the Coulomb interaction are accounted for by the introduction of a quantum defect. Here we translate this concept to the realm of semiconductor physics and show how the complex band dispersion of a crystal is mirrored in a set of empirical parameters similar to the quantum defect in atoms. Experimental data collected from high-resolution absorption spectroscopy in electric fields allow us to compare results for multiple angular momentum states of the yellow and even the green exciton series of Cu 2 O . The agreement between theory and experiment validates our assignment of the quantum defect to the nonparabolicity of the band dispersion.
影响因子：
64.8
作者：
Kazimierczuk, T.;Froehlich, D.;Bayer, M.
通讯作者：
Bayer, M.