Phonon-induced exciton weak localization in two-dimensional semiconductors

Autor:	Sivan Refaely-Abramson, Zakhar Iakovlev, Mikhail Glazov
Rok vydání:	2022
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Physics and Astronomy (miscellaneous) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences
Zdroj:	Applied Physics Letters. 121:192106
ISSN:	1077-3118 0003-6951
DOI:	10.1063/5.0122633
Popis:	We study theoretically the contribution of quantum effects to the exciton diffusion coefficient in atomically thin crystals. It is related to the weak localization caused by the interference of excitonic wavefunctions on the trajectories with closed loops. Due to a weak inelasticity of the exciton-phonon interaction the effect is present even if the excitons are scattered by long-wavelength acoustic phonons. We consider exciton interaction with longitudinal acoustic phonons with linear dispersion and with flexural phonons with quadratic dispersion. We identify the regimes where the weak localization effect can be particularly pronounced. We also briefly address the role of free charge carriers in the exciton quantum transport and, within the self-consistent theory of localization, the weak localization effects beyond the lowest order. 12 pages, 5 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0724f983e1ec7eb4c7ca004b1d565d5 https://doi.org/10.1063/5.0122633 Zobrazit plný text záznamu