Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder

Autores
Riera, Jose Alejandro
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The competition between on-site Coulomb repulsion and Rashba spin-orbit coupling (RSOC) is studied on two-leg ladders by numerical techniques. By studying persistent currents in closed rings by exact diagonalization, it is found that the contribution to the current due to the RSOC VSO, for a fixed value of the Hubbard repulsion U reaches a maximum at intermediate values of VSO. By increasing the repulsive Hubbard coupling U, this spin-flipping current is suppressed and eventually it becomes opposite to the spin-conserving current. The main result is that the spin accumulation defined as the relative spin polarization between the two legs of the ladder is enhanced by U. Similar results for this Hubbard-Rashba model are observed for a completely different setup in which two halves of the ladders are connected to a voltage bias and the ensuing time-dependent regime is studied by the density matrix renormalization group technique. The combined effect between VSO and U is also interesting, leading to a strong enhancement of antiferromagnetic order, which in turn may explain the observed behavior of the spin-flipping current. The implications of this enhancement of the spin-Hall effect with electron correlations for spintronic devices is discussed.
Fil: Riera, Jose Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina. Universidad Nacional de Rosario; Argentina
Materia
Rashba
Hubbard
Spin-Hall
Espintronica
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:11336/5921
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5921
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladderRiera, Jose AlejandroRashbaHubbardSpin-HallEspintronicahttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The competition between on-site Coulomb repulsion and Rashba spin-orbit coupling (RSOC) is studied on two-leg ladders by numerical techniques. By studying persistent currents in closed rings by exact diagonalization, it is found that the contribution to the current due to the RSOC VSO, for a fixed value of the Hubbard repulsion U reaches a maximum at intermediate values of VSO. By increasing the repulsive Hubbard coupling U, this spin-flipping current is suppressed and eventually it becomes opposite to the spin-conserving current. The main result is that the spin accumulation defined as the relative spin polarization between the two legs of the ladder is enhanced by U. Similar results for this Hubbard-Rashba model are observed for a completely different setup in which two halves of the ladders are connected to a voltage bias and the ensuing time-dependent regime is studied by the density matrix renormalization group technique. The combined effect between VSO and U is also interesting, leading to a strong enhancement of antiferromagnetic order, which in turn may explain the observed behavior of the spin-flipping current. The implications of this enhancement of the spin-Hall effect with electron correlations for spintronic devices is discussed.Fil: Riera, Jose Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina. Universidad Nacional de Rosario; ArgentinaAmerican Physical Society2013-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5921Riera, Jose Alejandro; Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 4; 7-2013; 45102-451021098-0121enginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.88.045102info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.045102info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T12:59:44Zoai:ri.conicet.gov.ar:11336/5921instacron: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:34982025-09-10 12:59:45.28CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
title Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
spellingShingle Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
Riera, Jose Alejandro
Rashba
Hubbard
Spin-Hall
Espintronica
title_short Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
title_full Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
title_fullStr Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
title_full_unstemmed Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
title_sort Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
dc.creator.none.fl_str_mv Riera, Jose Alejandro
author Riera, Jose Alejandro
author_facet Riera, Jose Alejandro
author_role author
dc.subject.none.fl_str_mv Rashba
Hubbard
Spin-Hall
Espintronica
topic Rashba
Hubbard
Spin-Hall
Espintronica
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The competition between on-site Coulomb repulsion and Rashba spin-orbit coupling (RSOC) is studied on two-leg ladders by numerical techniques. By studying persistent currents in closed rings by exact diagonalization, it is found that the contribution to the current due to the RSOC VSO, for a fixed value of the Hubbard repulsion U reaches a maximum at intermediate values of VSO. By increasing the repulsive Hubbard coupling U, this spin-flipping current is suppressed and eventually it becomes opposite to the spin-conserving current. The main result is that the spin accumulation defined as the relative spin polarization between the two legs of the ladder is enhanced by U. Similar results for this Hubbard-Rashba model are observed for a completely different setup in which two halves of the ladders are connected to a voltage bias and the ensuing time-dependent regime is studied by the density matrix renormalization group technique. The combined effect between VSO and U is also interesting, leading to a strong enhancement of antiferromagnetic order, which in turn may explain the observed behavior of the spin-flipping current. The implications of this enhancement of the spin-Hall effect with electron correlations for spintronic devices is discussed.
Fil: Riera, Jose Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina. Universidad Nacional de Rosario; Argentina
description The competition between on-site Coulomb repulsion and Rashba spin-orbit coupling (RSOC) is studied on two-leg ladders by numerical techniques. By studying persistent currents in closed rings by exact diagonalization, it is found that the contribution to the current due to the RSOC VSO, for a fixed value of the Hubbard repulsion U reaches a maximum at intermediate values of VSO. By increasing the repulsive Hubbard coupling U, this spin-flipping current is suppressed and eventually it becomes opposite to the spin-conserving current. The main result is that the spin accumulation defined as the relative spin polarization between the two legs of the ladder is enhanced by U. Similar results for this Hubbard-Rashba model are observed for a completely different setup in which two halves of the ladders are connected to a voltage bias and the ensuing time-dependent regime is studied by the density matrix renormalization group technique. The combined effect between VSO and U is also interesting, leading to a strong enhancement of antiferromagnetic order, which in turn may explain the observed behavior of the spin-flipping current. The implications of this enhancement of the spin-Hall effect with electron correlations for spintronic devices is discussed.
publishDate 2013
dc.date.none.fl_str_mv 2013-07
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/11336/5921
Riera, Jose Alejandro; Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 4; 7-2013; 45102-45102
1098-0121
url http://hdl.handle.net/11336/5921
identifier_str_mv Riera, Jose Alejandro; Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 4; 7-2013; 45102-45102
1098-0121
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.88.045102
info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.045102
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 13.004268

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