Deviations of the exciton level spectrum in cuprous oxide from the hydrogen series
Mesoscale and Nanoscale Physics
2016-02-23 v2 Quantum Physics
Abstract
Recent high-resolution absorption spectroscopy on excited excitons in cuprous oxide [Nature (London) 514, 343 (2014)] has revealed significant deviations of their spectrum from that of the ideal hydrogen-like series. Here we show that the complex band dispersion of the crystal, which determines the kinetic energy of electrons and holes, strongly affects the exciton binding energy. Specifically, we show that the nonparabolicity of the band dispersion is the main cause of the deviation from the hydrogen series. Experimental data collected from high-resolution absorption spectroscopy in electric fields validate the assignment of the deviation to the nonparabolicity of the band dispersion.
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Cite
@article{arxiv.1511.05458,
title = {Deviations of the exciton level spectrum in cuprous oxide from the hydrogen series},
author = {Florian Schöne and Sjard-Ole Krüger and Peter Grünwald and Marc Aßmann and Julian Heckötter and Johannes Thewes and Dietmar Fröhlich and Manfred Bayer and Heinrich Stolz and Stefan Scheel},
journal= {arXiv preprint arXiv:1511.05458},
year = {2016}
}