The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators

Abstract We study the joint effect of disorder and Coulomb interaction screening on the exciton spectra in two-dimensional (2D) structures. These can be van der Waals structures or heterostructures of organic (polymeric) semiconductors as well as inorganic substances like transition metal dichalcoge...

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Autores principales:	E. V. Kirichenko, V. A. Stephanovich
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c6f47fe3103446399520a32eafa48d17
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id	oai:doaj.org-article:c6f47fe3103446399520a32eafa48d17
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spelling	oai:doaj.org-article:c6f47fe3103446399520a32eafa48d172021-12-02T17:48:00ZThe influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators10.1038/s41598-021-91414-w2045-2322https://doaj.org/article/c6f47fe3103446399520a32eafa48d172021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91414-whttps://doaj.org/toc/2045-2322Abstract We study the joint effect of disorder and Coulomb interaction screening on the exciton spectra in two-dimensional (2D) structures. These can be van der Waals structures or heterostructures of organic (polymeric) semiconductors as well as inorganic substances like transition metal dichalcogenides. We consider 2D screened hydrogenic problem with Rytova–Keldysh interaction by means of so-called fractional Scrödinger equation. Our main finding is that above synergy between screening and disorder either destroys the exciton (strong screening) or promote the creation of a bound state, leading to its collapse in the extreme case. Our second finding is energy levels crossing, i.e. the degeneracy (with respect to index $$\mu $$ μ ) of the exciton eigenenergies at certain discrete value of screening radius. Latter effects may also be related to the quantum manifestations of chaotic exciton behavior in above 2D semiconductor structures. Hence, they should be considered in device applications, where the interplay between dielectric screening and disorder is important.E. V. KirichenkoV. A. StephanovichNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q E. V. Kirichenko V. A. Stephanovich The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
description	Abstract We study the joint effect of disorder and Coulomb interaction screening on the exciton spectra in two-dimensional (2D) structures. These can be van der Waals structures or heterostructures of organic (polymeric) semiconductors as well as inorganic substances like transition metal dichalcogenides. We consider 2D screened hydrogenic problem with Rytova–Keldysh interaction by means of so-called fractional Scrödinger equation. Our main finding is that above synergy between screening and disorder either destroys the exciton (strong screening) or promote the creation of a bound state, leading to its collapse in the extreme case. Our second finding is energy levels crossing, i.e. the degeneracy (with respect to index $$\mu $$ μ ) of the exciton eigenenergies at certain discrete value of screening radius. Latter effects may also be related to the quantum manifestations of chaotic exciton behavior in above 2D semiconductor structures. Hence, they should be considered in device applications, where the interplay between dielectric screening and disorder is important.
format	article
author	E. V. Kirichenko V. A. Stephanovich
author_facet	E. V. Kirichenko V. A. Stephanovich
author_sort	E. V. Kirichenko
title	The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
title_short	The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
title_full	The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
title_fullStr	The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
title_full_unstemmed	The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators
title_sort	influence of coulomb interaction screening on the excitons in disordered two-dimensional insulators
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c6f47fe3103446399520a32eafa48d17
work_keys_str_mv	AT evkirichenko theinfluenceofcoulombinteractionscreeningontheexcitonsindisorderedtwodimensionalinsulators AT vastephanovich theinfluenceofcoulombinteractionscreeningontheexcitonsindisorderedtwodimensionalinsulators AT evkirichenko influenceofcoulombinteractionscreeningontheexcitonsindisorderedtwodimensionalinsulators AT vastephanovich influenceofcoulombinteractionscreeningontheexcitonsindisorderedtwodimensionalinsulators
_version_	1718379494283149312

The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators

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