Spin-orbit effects on two-electron states in nanowhisker double quantum dots

We investigate theoretically the combined effects of the electron-electron and the Rashba spin-orbit interactions on two electrons confined in quasi-one-dimensional semiconductor double quantum dots. We study both InSb-based structures, which are of interest due to their strong spin-orbit coupling,...

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Autores: Romano, Carla Lidia, Tamborenea, Pablo Ignacio, Ulloa, S.E.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/61367
Acesso em linha:http://hdl.handle.net/11336/61367
Access Level:acceso abierto
Palavra-chave:Electron Interactions
Nanowhisker
Quantum Dots
Rashba Effect
Spin-Orbit Coupling
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Spin-orbit effects on two-electron states in nanowhisker double quantum dotsRomano, Carla LidiaTamborenea, Pablo IgnacioUlloa, S.E.Electron InteractionsNanowhiskerQuantum DotsRashba EffectSpin-Orbit Couplinghttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We investigate theoretically the combined effects of the electron-electron and the Rashba spin-orbit interactions on two electrons confined in quasi-one-dimensional semiconductor double quantum dots. We study both InSb-based structures, which are of interest due to their strong spin-orbit coupling, and also InAs-based systems, which have been recently studied experimentally. We calculate the two-electron wave functions in the effective-mass approximation and explore the interplay between the two interactions on the energy levels and the spin of the states. The energy spectrum as a function of an applied magnetic field shows crossings and anticrossings between triplet and singlet states, associated with level mixing induced by the spin-orbit coupling. We find that the fields at which these crossings occur can be naturally controlled by the interdot barrier width, which controls the exchange integral in the structure. © 2009 Elsevier B.V. All rights reserved.Fil: Romano, Carla Lidia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Tamborenea, Pablo Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Ulloa, S.E.. Ohio University; Estados UnidosElsevier Science2009-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61367Romano, Carla Lidia; Tamborenea, Pablo Ignacio; Ulloa, S.E.; Spin-orbit effects on two-electron states in nanowhisker double quantum dots; Elsevier Science; Physica E; 41; 8; 5-2009; 1577-15821386-9477CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VMT-4W8TWBG-2&_user=1675216&_coverDate=08%2F31%2F2009&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000054189&_version=1&_urlVersion=0&_userid=1675216&md5=a57e801cebe41ce29eca5finfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.physe.2009.04.039info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:55:35Zoai:ri.conicet.gov.ar:11336/61367instacron: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:34982024-05-08 13:55:36.158CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spin-orbit effects on two-electron states in nanowhisker double quantum dots
title Spin-orbit effects on two-electron states in nanowhisker double quantum dots
spellingShingle Spin-orbit effects on two-electron states in nanowhisker double quantum dots
Romano, Carla Lidia
Electron Interactions
Nanowhisker
Quantum Dots
Rashba Effect
Spin-Orbit Coupling
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Spin-orbit effects on two-electron states in nanowhisker double quantum dots
title_full Spin-orbit effects on two-electron states in nanowhisker double quantum dots
title_fullStr Spin-orbit effects on two-electron states in nanowhisker double quantum dots
title_full_unstemmed Spin-orbit effects on two-electron states in nanowhisker double quantum dots
title_sort Spin-orbit effects on two-electron states in nanowhisker double quantum dots
dc.creator.none.fl_str_mv Romano, Carla Lidia
Tamborenea, Pablo Ignacio
Ulloa, S.E.
author Romano, Carla Lidia
author_facet Romano, Carla Lidia
Tamborenea, Pablo Ignacio
Ulloa, S.E.
author_role author
author2 Tamborenea, Pablo Ignacio
Ulloa, S.E.
author2_role author
author
dc.subject.none.fl_str_mv Electron Interactions
Nanowhisker
Quantum Dots
Rashba Effect
Spin-Orbit Coupling
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Electron Interactions
Nanowhisker
Quantum Dots
Rashba Effect
Spin-Orbit Coupling
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description We investigate theoretically the combined effects of the electron-electron and the Rashba spin-orbit interactions on two electrons confined in quasi-one-dimensional semiconductor double quantum dots. We study both InSb-based structures, which are of interest due to their strong spin-orbit coupling, and also InAs-based systems, which have been recently studied experimentally. We calculate the two-electron wave functions in the effective-mass approximation and explore the interplay between the two interactions on the energy levels and the spin of the states. The energy spectrum as a function of an applied magnetic field shows crossings and anticrossings between triplet and singlet states, associated with level mixing induced by the spin-orbit coupling. We find that the fields at which these crossings occur can be naturally controlled by the interdot barrier width, which controls the exchange integral in the structure. © 2009 Elsevier B.V. All rights reserved.
publishDate 2009
dc.date.none.fl_str_mv 2009-05
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/11336/61367
Romano, Carla Lidia; Tamborenea, Pablo Ignacio; Ulloa, S.E.; Spin-orbit effects on two-electron states in nanowhisker double quantum dots; Elsevier Science; Physica E; 41; 8; 5-2009; 1577-1582
1386-9477
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61367
identifier_str_mv Romano, Carla Lidia; Tamborenea, Pablo Ignacio; Ulloa, S.E.; Spin-orbit effects on two-electron states in nanowhisker double quantum dots; Elsevier Science; Physica E; 41; 8; 5-2009; 1577-1582
1386-9477
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VMT-4W8TWBG-2&_user=1675216&_coverDate=08%2F31%2F2009&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000054189&_version=1&_urlVersion=0&_userid=1675216&md5=a57e801cebe41ce29eca5f
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physe.2009.04.039
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 Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,812429

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