Composite excitonic states in doped semiconductors

Autor:	Dinh Van Tuan, Hanan Dery
Rok vydání:	2022
Předmět:	Condensed Matter - Materials Science Condensed Matter::Materials Science Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences
Zdroj:	Physical Review B. 106
ISSN:	2469-9969 2469-9950
Popis:	We present a theoretical model of composite excitonic states in doped semiconductors. Many-body interactions between a photoexcited electron-hole pair and the electron gas are integrated into a computationally tractable few-body problem, solved by the variational method. We focus on electron-doped ML-MoSe$_2$ and ML-WSe$_2$ due to the contrasting character of their conduction bands. In both cases, the core of the composite is a tightly-bound trion (two electrons and valence-band hole), surrounded by a region depleted of electrons. The composite in ML-WSe$_2$ further includes a satellite electron with different quantum numbers. The theory is general and can be applied to semiconductors with various energy-band properties, allowing one to calculate their excitonic states and to quantify the interaction with the Fermi sea.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aaed80217aeaa3f7978acfb447b7d6b0 https://doi.org/10.1103/physrevb.106.l081301 Zobrazit plný text záznamu