Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts

Thermoelectric materials enable us to harness dissipated energy and make electronic devices less energydemanding. Heat-to-electricity conversion requires materials with a strongly suppressed thermal conductivity but still high electronic conduction. This goal is largely achieved with the help of nan...

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Detalles Bibliográficos
Autores: Sánchez Ramírez, Irián, Baba, Yuriko Caterina, Chico Gómez, Leonor María, Domínguez-Adame Acosta, Francisco
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/71971
Acceso en línea:https://hdl.handle.net/20.500.14352/71971
Access Level:acceso abierto
Palabra clave:538.9
Carbon
Materials science
Multidisciplinary
Applied Physics
Condensed matter
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
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spelling Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contactsSánchez Ramírez, IriánBaba, Yuriko CaterinaChico Gómez, Leonor MaríaDomínguez-Adame Acosta, Francisco538.9CarbonMaterials scienceMultidisciplinaryApplied PhysicsCondensed matterFísica de materialesFísica del estado sólido2211 Física del Estado SólidoThermoelectric materials enable us to harness dissipated energy and make electronic devices less energydemanding. Heat-to-electricity conversion requires materials with a strongly suppressed thermal conductivity but still high electronic conduction. This goal is largely achieved with the help of nanostructured materials, even if the bulk counterpart is not highly efficient. In this work, we investigate how thermoelectric efficiency is enhanced by many-body effects in graphene nanoribbons at low temperature. To this end, starting from the Kane-Mele-Hubbard model within a mean-field approximation, we carry out an extensive numerical study of the impact of electron-electron interactions on the thermoelectric efficiency of graphene nanoribbons with armchair or zigzag edges. We consider two different regimes, namely trivial and topological insulators. We find that electron-electron interactions are crucial for the appearance of interference phenomena that give rise to an enhancement of the thermoelectric efficiency of the nanoribbons. Lastly, we also propose an experimental setup that would help to test the validity of our conclusions.American Physical SocietyUniversidad Complutense de Madrid20222022-07-2120222022-07-21journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/71971reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/719712026-06-02T12:44:21Z
dc.title.none.fl_str_mv Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
title Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
spellingShingle Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
Sánchez Ramírez, Irián
538.9
Carbon
Materials science
Multidisciplinary
Applied Physics
Condensed matter
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
title_short Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
title_full Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
title_fullStr Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
title_full_unstemmed Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
title_sort Impact of electron-electron interactions on the thermoelectric efficiency of graphene quantum point contacts
dc.creator.none.fl_str_mv Sánchez Ramírez, Irián
Baba, Yuriko Caterina
Chico Gómez, Leonor María
Domínguez-Adame Acosta, Francisco
author Sánchez Ramírez, Irián
author_facet Sánchez Ramírez, Irián
Baba, Yuriko Caterina
Chico Gómez, Leonor María
Domínguez-Adame Acosta, Francisco
author_role author
author2 Baba, Yuriko Caterina
Chico Gómez, Leonor María
Domínguez-Adame Acosta, Francisco
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Carbon
Materials science
Multidisciplinary
Applied Physics
Condensed matter
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Carbon
Materials science
Multidisciplinary
Applied Physics
Condensed matter
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
description Thermoelectric materials enable us to harness dissipated energy and make electronic devices less energydemanding. Heat-to-electricity conversion requires materials with a strongly suppressed thermal conductivity but still high electronic conduction. This goal is largely achieved with the help of nanostructured materials, even if the bulk counterpart is not highly efficient. In this work, we investigate how thermoelectric efficiency is enhanced by many-body effects in graphene nanoribbons at low temperature. To this end, starting from the Kane-Mele-Hubbard model within a mean-field approximation, we carry out an extensive numerical study of the impact of electron-electron interactions on the thermoelectric efficiency of graphene nanoribbons with armchair or zigzag edges. We consider two different regimes, namely trivial and topological insulators. We find that electron-electron interactions are crucial for the appearance of interference phenomena that give rise to an enhancement of the thermoelectric efficiency of the nanoribbons. Lastly, we also propose an experimental setup that would help to test the validity of our conclusions.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-07-21
2022
2022-07-21
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/71971
url https://hdl.handle.net/20.500.14352/71971
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:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413664579125248
score 15.301629

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