Phononic Fano resonances in graphene nanoribbons with local defects

Abstract We study the interaction between localized vibrational modes and propagating phonons in graphene nanoribbons with different types of localized internal and edge defects. We analyze discrete eigenmodes of the nanoribbons with defects and also employ direct numerical simulations of the ballis...

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Autores principales:	Alexander V. Savin, Yuri S. Kivshar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e0a66f0134524c82b69c798b859022b5
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spelling	oai:doaj.org-article:e0a66f0134524c82b69c798b859022b52021-12-02T15:06:19ZPhononic Fano resonances in graphene nanoribbons with local defects10.1038/s41598-017-04987-w2045-2322https://doaj.org/article/e0a66f0134524c82b69c798b859022b52017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04987-whttps://doaj.org/toc/2045-2322Abstract We study the interaction between localized vibrational modes and propagating phonons in graphene nanoribbons with different types of localized internal and edge defects. We analyze discrete eigenmodes of the nanoribbons with defects and also employ direct numerical simulations of the ballistic phonon and heat transport. We observe a partial suppression of the phonon transport due to the so-called phononic Fano resonances originating from interference between localized and propagating phonons. We observe lower transmission for the defects which support larger number of localized eigenmodes. The Fano resonance is also manifested in the reduction of the heat transport along the graphene stripe, when each of the local defects reduces the amount of the heat flow transmitted through the nanoribbon, with the effect being more pronounced at low temperatures when the thermal energy transfer is dominated by the phonon transport. We also study the similar problems for edge defects in graphene nanoribbons and demonstrate that a reduction of the thermal conductivity is proportional to the length of a rough edge of the nanoribbon with edge defects.Alexander V. SavinYuri S. KivsharNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-19 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander V. Savin Yuri S. Kivshar Phononic Fano resonances in graphene nanoribbons with local defects
description	Abstract We study the interaction between localized vibrational modes and propagating phonons in graphene nanoribbons with different types of localized internal and edge defects. We analyze discrete eigenmodes of the nanoribbons with defects and also employ direct numerical simulations of the ballistic phonon and heat transport. We observe a partial suppression of the phonon transport due to the so-called phononic Fano resonances originating from interference between localized and propagating phonons. We observe lower transmission for the defects which support larger number of localized eigenmodes. The Fano resonance is also manifested in the reduction of the heat transport along the graphene stripe, when each of the local defects reduces the amount of the heat flow transmitted through the nanoribbon, with the effect being more pronounced at low temperatures when the thermal energy transfer is dominated by the phonon transport. We also study the similar problems for edge defects in graphene nanoribbons and demonstrate that a reduction of the thermal conductivity is proportional to the length of a rough edge of the nanoribbon with edge defects.
format	article
author	Alexander V. Savin Yuri S. Kivshar
author_facet	Alexander V. Savin Yuri S. Kivshar
author_sort	Alexander V. Savin
title	Phononic Fano resonances in graphene nanoribbons with local defects
title_short	Phononic Fano resonances in graphene nanoribbons with local defects
title_full	Phononic Fano resonances in graphene nanoribbons with local defects
title_fullStr	Phononic Fano resonances in graphene nanoribbons with local defects
title_full_unstemmed	Phononic Fano resonances in graphene nanoribbons with local defects
title_sort	phononic fano resonances in graphene nanoribbons with local defects
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e0a66f0134524c82b69c798b859022b5
work_keys_str_mv	AT alexandervsavin phononicfanoresonancesingraphenenanoribbonswithlocaldefects AT yuriskivshar phononicfanoresonancesingraphenenanoribbonswithlocaldefects
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Phononic Fano resonances in graphene nanoribbons with local defects

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