Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene

Autores
Usaj, Gonzalo; Cornaglia de la Cruz, Pablo Sebastian; Balseiro, Carlos Antonio
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyze the electronic properties of adatom-doped graphene in the low-impurity-concentration regime. We focus on the Anderson localized regime and calculate the localization length ξ as a function of the electron doping and an external magnetic field. The impurity states hybridize with carbon's p z states and form a partially filled band close to the Dirac point. Near the impurity band center, the chiral symmetry of the system's effective Hamiltonian is partially preserved, which leads to a large enhancement of ξ . The sensitivity of transport properties, namely, Mott's variable range hopping scale T 0 , to an external magnetic field perpendicular to the graphene sheet leads to a colossal magnetoresistance effect, as observed in recent experiments.
Fil: Usaj, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Cornaglia de la Cruz, Pablo Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area Invest y Aplicaciones No Nucleares. Gerencia de Fisica (Centro Atómico Bariloche). Div.resonancias Magneticas; Argentina
Fil: Balseiro, Carlos Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Materia
Graphene
Impurities
Localization
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/11255
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped grapheneUsaj, GonzaloCornaglia de la Cruz, Pablo SebastianBalseiro, Carlos AntonioGrapheneImpuritiesLocalizationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We analyze the electronic properties of adatom-doped graphene in the low-impurity-concentration regime. We focus on the Anderson localized regime and calculate the localization length ξ as a function of the electron doping and an external magnetic field. The impurity states hybridize with carbon's p z states and form a partially filled band close to the Dirac point. Near the impurity band center, the chiral symmetry of the system's effective Hamiltonian is partially preserved, which leads to a large enhancement of ξ . The sensitivity of transport properties, namely, Mott's variable range hopping scale T 0 , to an external magnetic field perpendicular to the graphene sheet leads to a colossal magnetoresistance effect, as observed in recent experiments.Fil: Usaj, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaFil: Cornaglia de la Cruz, Pablo Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area Invest y Aplicaciones No Nucleares. Gerencia de Fisica (Centro Atómico Bariloche). Div.resonancias Magneticas; ArgentinaFil: Balseiro, Carlos Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaAmerican Physical Society2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/11255Usaj, Gonzalo; Cornaglia de la Cruz, Pablo Sebastian; Balseiro, Carlos Antonio; Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene; American Physical Society; Physical Review B - Solid State; 89; 8; 2-2014; 85405-854092469-99502469-9969enginfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1311.7389info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.89.085405info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:28:11Zoai:ri.conicet.gov.ar:11336/11255instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:28:11.868CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
title Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
spellingShingle Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
Usaj, Gonzalo
Graphene
Impurities
Localization
title_short Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
title_full Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
title_fullStr Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
title_full_unstemmed Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
title_sort Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene
dc.creator.none.fl_str_mv Usaj, Gonzalo
Cornaglia de la Cruz, Pablo Sebastian
Balseiro, Carlos Antonio
author Usaj, Gonzalo
author_facet Usaj, Gonzalo
Cornaglia de la Cruz, Pablo Sebastian
Balseiro, Carlos Antonio
author_role author
author2 Cornaglia de la Cruz, Pablo Sebastian
Balseiro, Carlos Antonio
author2_role author
author
dc.subject.none.fl_str_mv Graphene
Impurities
Localization
topic Graphene
Impurities
Localization
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We analyze the electronic properties of adatom-doped graphene in the low-impurity-concentration regime. We focus on the Anderson localized regime and calculate the localization length ξ as a function of the electron doping and an external magnetic field. The impurity states hybridize with carbon's p z states and form a partially filled band close to the Dirac point. Near the impurity band center, the chiral symmetry of the system's effective Hamiltonian is partially preserved, which leads to a large enhancement of ξ . The sensitivity of transport properties, namely, Mott's variable range hopping scale T 0 , to an external magnetic field perpendicular to the graphene sheet leads to a colossal magnetoresistance effect, as observed in recent experiments.
Fil: Usaj, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Cornaglia de la Cruz, Pablo Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area Invest y Aplicaciones No Nucleares. Gerencia de Fisica (Centro Atómico Bariloche). Div.resonancias Magneticas; Argentina
Fil: Balseiro, Carlos Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
description We analyze the electronic properties of adatom-doped graphene in the low-impurity-concentration regime. We focus on the Anderson localized regime and calculate the localization length ξ as a function of the electron doping and an external magnetic field. The impurity states hybridize with carbon's p z states and form a partially filled band close to the Dirac point. Near the impurity band center, the chiral symmetry of the system's effective Hamiltonian is partially preserved, which leads to a large enhancement of ξ . The sensitivity of transport properties, namely, Mott's variable range hopping scale T 0 , to an external magnetic field perpendicular to the graphene sheet leads to a colossal magnetoresistance effect, as observed in recent experiments.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/11255
Usaj, Gonzalo; Cornaglia de la Cruz, Pablo Sebastian; Balseiro, Carlos Antonio; Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene; American Physical Society; Physical Review B - Solid State; 89; 8; 2-2014; 85405-85409
2469-9950
2469-9969
url http://hdl.handle.net/11336/11255
identifier_str_mv Usaj, Gonzalo; Cornaglia de la Cruz, Pablo Sebastian; Balseiro, Carlos Antonio; Partial preservation of chiral symmetry and colossal magnetoresistance in adatom doped graphene; American Physical Society; Physical Review B - Solid State; 89; 8; 2-2014; 85405-85409
2469-9950
2469-9969
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1311.7389
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.89.085405
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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