Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3

Under the terms of the Creative Commons Attribution License 3.0 (CC-BY).-- et al.

Detalles Bibliográficos
Autores: Nechaev, I. A., Aguilera, I., Politano, A., Aliev, Ziya S., Friedrich, C., Blügel, S., Chulkov, Eugene V.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/136614
Acceso en línea:http://hdl.handle.net/10261/136614
Access Level:acceso abierto
Palabra clave:ddc:530
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spelling Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3Nechaev, I. A.Aguilera, I.Politano, A.Aliev, Ziya S.Friedrich, C.Blügel, S.Chulkov, Eugene V.ddc:530Under the terms of the Creative Commons Attribution License 3.0 (CC-BY).-- et al.We report first-principles GW results on the dispersion of the bulk band-gap edges in the three-dimensional topological insulator Sb2Te3. We find that, independently of the reference density-functional-theory band structure and the crystal-lattice parameters used, the one-shot GW corrections enlarge the fundamental band gap, bringing its value in close agreement with experiment. We conclude that the GW corrections cause the displacement of the valence-band maximum (VBM) to the Γ point, ensuring that the surface-state Dirac point lies above the VBM. We extend our study to the analysis of the electron-energy-loss spectrum (EELS) of bulk Sb2Te3. In particular, we perform energy-filtered transmission electron microscopy and reflection EELS measurements. We show that the random-phase approximation with the GW quasiparticle energies and taking into account virtual excitations from the semicore states leads to good agreement with our experimental data.We acknowledge funding from the University of Basque Country UPV/EHU (IT-756-13), the Departamento de Educacion del Gobierno Vasco, the Tomsk State University Competitiveness Improvement Program, the Spanish Ministry of Economy and Competitiveness MINECO (Grant No. FIS2013-48286-C2-1-P), the Science Development Foundation under the President of the Republic of Azerbaijan [Grant No. EIF-2011-1(3)-82/69/4-M-50], and Saint Petersburg State University (Project No. 11.50.202.2015). The energy-filtered TEM experiment was performed at Beyond-Nano (PON a3-00363). The EELS experiment was performed at UNIMORE, and acknowledges partial support from PRIN GRAF 20105ZZTSE-008. The work was also supported by the Alexander von Humboldt Foundation through a postdoctoral fellowship, and by the Helmholtz Association through the Virtual Institute for Topological Insulators (VITI).Peer ReviewedAmerican Physical SocietyScience Development Foundation under the President of the Republic of AzerbaijanTomsk State UniversityMinisterio de Economía y Competitividad (España)Alexander von Humboldt FoundationHelmholtz AssociationUniversidad del País VascoEusko JaurlaritzaSaint Petersburg State UniversityConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016201620152016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/136614reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-48286-C2-1-Phttp://dx.doi.org/10.1103/PhysRevB.91.245123Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1366142026-05-22T06:33:51Z
dc.title.none.fl_str_mv Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
title Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
spellingShingle Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
Nechaev, I. A.
ddc:530
title_short Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
title_full Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
title_fullStr Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
title_full_unstemmed Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
title_sort Quasiparticle spectrum and plasmonic excitations in the topological insulator Sb2Te3
dc.creator.none.fl_str_mv Nechaev, I. A.
Aguilera, I.
Politano, A.
Aliev, Ziya S.
Friedrich, C.
Blügel, S.
Chulkov, Eugene V.
author Nechaev, I. A.
author_facet Nechaev, I. A.
Aguilera, I.
Politano, A.
Aliev, Ziya S.
Friedrich, C.
Blügel, S.
Chulkov, Eugene V.
author_role author
author2 Aguilera, I.
Politano, A.
Aliev, Ziya S.
Friedrich, C.
Blügel, S.
Chulkov, Eugene V.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Science Development Foundation under the President of the Republic of Azerbaijan
Tomsk State University
Ministerio de Economía y Competitividad (España)
Alexander von Humboldt Foundation
Helmholtz Association
Universidad del País Vasco
Eusko Jaurlaritza
Saint Petersburg State University
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ddc:530
topic ddc:530
description Under the terms of the Creative Commons Attribution License 3.0 (CC-BY).-- et al.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
2016
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/10261/136614
url http://hdl.handle.net/10261/136614
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-48286-C2-1-P
http://dx.doi.org/10.1103/PhysRevB.91.245123
Sí
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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