Flexural phonons in supported graphene: from pinning to localization

Abstract We identify graphene layer on a disordered substrate as a system where localization of phonons can be observed. Generally, observation of localization for scattering waves is not simple, because the Rayleigh scattering is inversely proportional to a high power of wavelength. The situation i...

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Autores principales:	Wei L. Z. Zhao, Konstantin S. Tikhonov, Alexander M. Finkel’stein
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Flexural Phonons (FPs) Vanishing Wave Vector Graphene Layers Inverse Participation Ratio (IPR) Electron Heat Diffusion Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b6d2384f950849eab05a2fdb0818445c
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spelling	oai:doaj.org-article:b6d2384f950849eab05a2fdb0818445c2021-12-02T15:08:42ZFlexural phonons in supported graphene: from pinning to localization10.1038/s41598-018-34426-32045-2322https://doaj.org/article/b6d2384f950849eab05a2fdb0818445c2018-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-34426-3https://doaj.org/toc/2045-2322Abstract We identify graphene layer on a disordered substrate as a system where localization of phonons can be observed. Generally, observation of localization for scattering waves is not simple, because the Rayleigh scattering is inversely proportional to a high power of wavelength. The situation is radically different for the out of plane vibrations, so-called flexural phonons, scattered by pinning centers induced by a substrate. In this case, the scattering time for vanishing wave vector tends to a finite limit. One may, therefore, expect that physics of the flexural phonons exhibits features characteristic for electron localization in two dimensions, albeit without complications caused by the electron-electron interactions. We confirm this idea by calculating statistical properties of the Anderson localization of flexural phonons for a model of elastic sheet in the presence of the pinning centers. Finally, we discuss possible manifestations of the flexural phonons, including the localized ones, in the electronic thermal conductance.Wei L. Z. ZhaoKonstantin S. TikhonovAlexander M. Finkel’steinNature PortfolioarticleFlexural Phonons (FPs)Vanishing Wave VectorGraphene LayersInverse Participation Ratio (IPR)Electron Heat DiffusionMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Flexural Phonons (FPs) Vanishing Wave Vector Graphene Layers Inverse Participation Ratio (IPR) Electron Heat Diffusion Medicine R Science Q
spellingShingle	Flexural Phonons (FPs) Vanishing Wave Vector Graphene Layers Inverse Participation Ratio (IPR) Electron Heat Diffusion Medicine R Science Q Wei L. Z. Zhao Konstantin S. Tikhonov Alexander M. Finkel’stein Flexural phonons in supported graphene: from pinning to localization
description	Abstract We identify graphene layer on a disordered substrate as a system where localization of phonons can be observed. Generally, observation of localization for scattering waves is not simple, because the Rayleigh scattering is inversely proportional to a high power of wavelength. The situation is radically different for the out of plane vibrations, so-called flexural phonons, scattered by pinning centers induced by a substrate. In this case, the scattering time for vanishing wave vector tends to a finite limit. One may, therefore, expect that physics of the flexural phonons exhibits features characteristic for electron localization in two dimensions, albeit without complications caused by the electron-electron interactions. We confirm this idea by calculating statistical properties of the Anderson localization of flexural phonons for a model of elastic sheet in the presence of the pinning centers. Finally, we discuss possible manifestations of the flexural phonons, including the localized ones, in the electronic thermal conductance.
format	article
author	Wei L. Z. Zhao Konstantin S. Tikhonov Alexander M. Finkel’stein
author_facet	Wei L. Z. Zhao Konstantin S. Tikhonov Alexander M. Finkel’stein
author_sort	Wei L. Z. Zhao
title	Flexural phonons in supported graphene: from pinning to localization
title_short	Flexural phonons in supported graphene: from pinning to localization
title_full	Flexural phonons in supported graphene: from pinning to localization
title_fullStr	Flexural phonons in supported graphene: from pinning to localization
title_full_unstemmed	Flexural phonons in supported graphene: from pinning to localization
title_sort	flexural phonons in supported graphene: from pinning to localization
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/b6d2384f950849eab05a2fdb0818445c
work_keys_str_mv	AT weilzzhao flexuralphononsinsupportedgraphenefrompinningtolocalization AT konstantinstikhonov flexuralphononsinsupportedgraphenefrompinningtolocalization AT alexandermfinkelstein flexuralphononsinsupportedgraphenefrompinningtolocalization
_version_	1718388082764414976

Flexural phonons in supported graphene: from pinning to localization

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