Electronic and structural characterization of divacancies in irradiated graphene

We provide a thorough study of a carbon divacancy, a point defect expected to have a large impact on the properties of graphene. Low-temperature scanning tunneling microscopy imaging of irradiated graphene on different substrates enabled us to identify a common twofold symmetry point defect. Our fir...

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Autores: Ugeda, Miguel M., Brihuega Álvarez, Iván, Hiebel, Fanny, Mallet, Pierre, Veuillen, Jean Yves, Gómez Rodríguez, José María, Ynduráin Muñoz, Félix
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/669844
Acceso en línea:http://hdl.handle.net/10486/669844
https://dx.doi.org/10.1103/PhysRevB.85.121402
Access Level:acceso abierto
Palabra clave:Física
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spelling Electronic and structural characterization of divacancies in irradiated grapheneUgeda, Miguel M.Brihuega Álvarez, IvánHiebel, FannyMallet, PierreVeuillen, Jean YvesGómez Rodríguez, José MaríaYnduráin Muñoz, FélixFísicaWe provide a thorough study of a carbon divacancy, a point defect expected to have a large impact on the properties of graphene. Low-temperature scanning tunneling microscopy imaging of irradiated graphene on different substrates enabled us to identify a common twofold symmetry point defect. Our first-principles calculations reveal that the structure of this type of defect accommodates two adjacent missing atoms in a rearranged atomic network formed by two pentagons and one octagon, with no dangling bonds. Scanning tunneling spectroscopy measurements on divacancies generated in nearly ideal graphene show an electronic spectrum dominated by an empty-states resonance, which is ascribed to a nearly flat, spin-degenerated band of π-electron nature. While the calculated electronic structure rules out the formation of a magnetic moment around the divacancy, the generation of an electronic resonance near the Fermi level reveals divacancies as key point defects for tuning electron transport properties in graphene systemsThis work was supported by Spain’s MICINN under Grants No. MAT2010-14902, No. CSD2010-00024, and No. CSD2007-00050, and by Comunidad de Madrid under Grant No. S2009/MAT-1467. M.M.U., I.B., F.H, P.M, J.Y.V., and J.M.G.R. also acknowledge the PHC Picasso program for financial support (project No. 22885NH).M.M.U. acknowledges financial support from MEC under FPU Grant No. AP-2004-1896. I.B. was supported by a Ramón y Cajal project of the Spanish MEC. F.H. held a doctoral support from the Région Rhòne-AlpesAmerican Physical SocietyDepartamento de Física de la Materia CondensadaFacultad de Ciencias20122012-03-08research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/669844https://dx.doi.org/10.1103/PhysRevB.85.121402reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6698442026-06-23T12:46:27Z
dc.title.none.fl_str_mv Electronic and structural characterization of divacancies in irradiated graphene
title Electronic and structural characterization of divacancies in irradiated graphene
spellingShingle Electronic and structural characterization of divacancies in irradiated graphene
Ugeda, Miguel M.
Física
title_short Electronic and structural characterization of divacancies in irradiated graphene
title_full Electronic and structural characterization of divacancies in irradiated graphene
title_fullStr Electronic and structural characterization of divacancies in irradiated graphene
title_full_unstemmed Electronic and structural characterization of divacancies in irradiated graphene
title_sort Electronic and structural characterization of divacancies in irradiated graphene
dc.creator.none.fl_str_mv Ugeda, Miguel M.
Brihuega Álvarez, Iván
Hiebel, Fanny
Mallet, Pierre
Veuillen, Jean Yves
Gómez Rodríguez, José María
Ynduráin Muñoz, Félix
author Ugeda, Miguel M.
author_facet Ugeda, Miguel M.
Brihuega Álvarez, Iván
Hiebel, Fanny
Mallet, Pierre
Veuillen, Jean Yves
Gómez Rodríguez, José María
Ynduráin Muñoz, Félix
author_role author
author2 Brihuega Álvarez, Iván
Hiebel, Fanny
Mallet, Pierre
Veuillen, Jean Yves
Gómez Rodríguez, José María
Ynduráin Muñoz, Félix
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física de la Materia Condensada
Facultad de Ciencias
dc.subject.none.fl_str_mv Física
topic Física
description We provide a thorough study of a carbon divacancy, a point defect expected to have a large impact on the properties of graphene. Low-temperature scanning tunneling microscopy imaging of irradiated graphene on different substrates enabled us to identify a common twofold symmetry point defect. Our first-principles calculations reveal that the structure of this type of defect accommodates two adjacent missing atoms in a rearranged atomic network formed by two pentagons and one octagon, with no dangling bonds. Scanning tunneling spectroscopy measurements on divacancies generated in nearly ideal graphene show an electronic spectrum dominated by an empty-states resonance, which is ascribed to a nearly flat, spin-degenerated band of π-electron nature. While the calculated electronic structure rules out the formation of a magnetic moment around the divacancy, the generation of an electronic resonance near the Fermi level reveals divacancies as key point defects for tuning electron transport properties in graphene systems
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-03-08
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/669844
https://dx.doi.org/10.1103/PhysRevB.85.121402
url http://hdl.handle.net/10486/669844
https://dx.doi.org/10.1103/PhysRevB.85.121402
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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