We develop a many-body approach to the behavior of exciton bound states and the conduction electron band edge in a surrounding electron-hole plasma with a focus on the absorption spectrum of Rydberg excitons in cuprous oxide. The interplay of band edge and exciton levels is analyzed numerically, whereby the self-consistent solution is compared to the semiclassical Debye approximation. Our results provide criteria which allow to verify or rule out the different band edge models against future experimental data.
@article{arxiv.1906.10384,
title = {Influence of electron-hole plasma on Rydberg excitons in cuprous oxide},
author = {Dirk Semkat and Holger Fehske and Heinrich Stolz},
journal= {arXiv preprint arXiv:1906.10384},
year = {2019}
}