Acoustoelectric current in graphene nanoribbon due to Landau damping

Abstract We perform self-consistent analysis of the Boltzmann transport equation for momentum and energy in the hypersound regime i.e., $$ql \gg 1$$ q l ≫ 1 ( $$q$$ q is the acoustic wavenumber and l is the mean free path). We investigate the Landau damping of acoustic phonons ( $$LDOAP$$ LDOAP ) in...

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Autores principales:	K. A. Dompreh, K. W. Adu, D. Sakyi-Arthur, N. G. Mensah, S. Y. Mensah, A. Twum, M. Amekpewu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8f2553419dd4f698844620cc6172340
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spelling	oai:doaj.org-article:d8f2553419dd4f698844620cc61723402021-12-02T14:58:48ZAcoustoelectric current in graphene nanoribbon due to Landau damping10.1038/s41598-021-95896-62045-2322https://doaj.org/article/d8f2553419dd4f698844620cc61723402021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95896-6https://doaj.org/toc/2045-2322Abstract We perform self-consistent analysis of the Boltzmann transport equation for momentum and energy in the hypersound regime i.e., $$ql \gg 1$$ q l ≫ 1 ( $$q$$ q is the acoustic wavenumber and l is the mean free path). We investigate the Landau damping of acoustic phonons ( $$LDOAP$$ LDOAP ) in graphene nanoribbons, which leads to acoustoelectric current generation. Under a non-quantized field with drift velocity, we observed an acoustic phonon energy quantization that depends on the energy gap, the width, and the sub-index of the material. An effect similar to Cerenkov emission was observed, where the electron absorbed the confined acoustic phonon energy, causing the generation of acoustoelectric current in the graphene nanoribbon. A qualitative analysis of the dependence of the absorption coefficient and the acoustoelectric current on the phonon frequency is in agreement with experimental reports. We observed a shift in the peaks when the energy gap and the drift velocity were varied. Most importantly, a transparency window appears when the absorption coefficient is zero, making graphene nanoribbons a potential candidate for use as an acoustic wave filter with applications in tunable gate-controlled quantum information devices and phonon spectrometers.K. A. DomprehK. W. AduD. Sakyi-ArthurN. G. MensahS. Y. MensahA. TwumM. AmekpewuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q K. A. Dompreh K. W. Adu D. Sakyi-Arthur N. G. Mensah S. Y. Mensah A. Twum M. Amekpewu Acoustoelectric current in graphene nanoribbon due to Landau damping
description	Abstract We perform self-consistent analysis of the Boltzmann transport equation for momentum and energy in the hypersound regime i.e., $$ql \gg 1$$ q l ≫ 1 ( $$q$$ q is the acoustic wavenumber and l is the mean free path). We investigate the Landau damping of acoustic phonons ( $$LDOAP$$ LDOAP ) in graphene nanoribbons, which leads to acoustoelectric current generation. Under a non-quantized field with drift velocity, we observed an acoustic phonon energy quantization that depends on the energy gap, the width, and the sub-index of the material. An effect similar to Cerenkov emission was observed, where the electron absorbed the confined acoustic phonon energy, causing the generation of acoustoelectric current in the graphene nanoribbon. A qualitative analysis of the dependence of the absorption coefficient and the acoustoelectric current on the phonon frequency is in agreement with experimental reports. We observed a shift in the peaks when the energy gap and the drift velocity were varied. Most importantly, a transparency window appears when the absorption coefficient is zero, making graphene nanoribbons a potential candidate for use as an acoustic wave filter with applications in tunable gate-controlled quantum information devices and phonon spectrometers.
format	article
author	K. A. Dompreh K. W. Adu D. Sakyi-Arthur N. G. Mensah S. Y. Mensah A. Twum M. Amekpewu
author_facet	K. A. Dompreh K. W. Adu D. Sakyi-Arthur N. G. Mensah S. Y. Mensah A. Twum M. Amekpewu
author_sort	K. A. Dompreh
title	Acoustoelectric current in graphene nanoribbon due to Landau damping
title_short	Acoustoelectric current in graphene nanoribbon due to Landau damping
title_full	Acoustoelectric current in graphene nanoribbon due to Landau damping
title_fullStr	Acoustoelectric current in graphene nanoribbon due to Landau damping
title_full_unstemmed	Acoustoelectric current in graphene nanoribbon due to Landau damping
title_sort	acoustoelectric current in graphene nanoribbon due to landau damping
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d8f2553419dd4f698844620cc6172340
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Acoustoelectric current in graphene nanoribbon due to Landau damping

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