Translation-Invariant Excitons in a Phonon Field

Autor:	Lakhno, Victor D.
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons
Zdroj:	Condens. Matter 2021, 6(2), 20
Druh dokumentu:	Working Paper
DOI:	10.3390/condmat6020020
Popis:	Large-radius excitons in polar crystals are considered. It is shown that translation invariant description of excitons interacting with a phonon field leads to a nonzero contribution of phonons into the exciton ground state energy only in the case of weak or intermediate electron-phonon coupling. A conclusion is made that self-trapped excitons cannot exist in the limit of strong coupling. Peculiarities of the absorption and emission spectra of translation invariant excitons in a phonon field are discussed. Conditions when the hydrogen-like exciton model remains valid in the case of electron-phonon interaction are found. Comment: 13 pages. Slightly edited version. Refs. [24], [36], [38] were added
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2105.09287 Zobrazit plný text záznamu View this record from Arxiv