Dielectric screening and plasmons in AA-stacked bilayer graphene

The screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation. Whereas long-lived plasmons in single-layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can...

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Detalles Bibliográficos
Autores: Roldán, Rafael, Brey, Luis
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/94042
Acceso en línea:http://hdl.handle.net/10261/94042
Access Level:acceso abierto
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spelling Dielectric screening and plasmons in AA-stacked bilayer grapheneRoldán, RafaelBrey, LuisThe screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation. Whereas long-lived plasmons in single-layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can disperse in AA-stacked bilayer graphene even in the absence of doping. Moreover, we show that the characteristic low-energy dispersion relation is unaffected by changes in the number of carriers, unless the chemical potential of the doped sample exceeds the interlayer hopping energy. We further consider the effect of an external electric field applied perpendicular to the layers, and show how the dispersion of the modes can be tuned by the application of a gate voltage. © 2013 American Physical Society.R.R. acknowledges financial support from the Juan de la Cierva Program and from Grant No. FIS2011-23713 (MINECO, Spain). L.B. acknowledges financial support by MINECO-Spain under Grant No. FIS2012-33521.Peer ReviewedAmerican Physical Society2014201420132014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/94042reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevB.88.115420info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/940422026-05-22T06:33:51Z
dc.title.none.fl_str_mv Dielectric screening and plasmons in AA-stacked bilayer graphene
title Dielectric screening and plasmons in AA-stacked bilayer graphene
spellingShingle Dielectric screening and plasmons in AA-stacked bilayer graphene
Roldán, Rafael
title_short Dielectric screening and plasmons in AA-stacked bilayer graphene
title_full Dielectric screening and plasmons in AA-stacked bilayer graphene
title_fullStr Dielectric screening and plasmons in AA-stacked bilayer graphene
title_full_unstemmed Dielectric screening and plasmons in AA-stacked bilayer graphene
title_sort Dielectric screening and plasmons in AA-stacked bilayer graphene
dc.creator.none.fl_str_mv Roldán, Rafael
Brey, Luis
author Roldán, Rafael
author_facet Roldán, Rafael
Brey, Luis
author_role author
author2 Brey, Luis
author2_role author
description The screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation. Whereas long-lived plasmons in single-layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can disperse in AA-stacked bilayer graphene even in the absence of doping. Moreover, we show that the characteristic low-energy dispersion relation is unaffected by changes in the number of carriers, unless the chemical potential of the doped sample exceeds the interlayer hopping energy. We further consider the effect of an external electric field applied perpendicular to the layers, and show how the dispersion of the modes can be tuned by the application of a gate voltage. © 2013 American Physical Society.
publishDate 2013
dc.date.none.fl_str_mv 2013
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/94042
url http://hdl.handle.net/10261/94042
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevB.88.115420
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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