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dc.contributor.author
Riera, Jose Alejandro
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dc.date.available
2016-05-30T20:29:43Z
dc.date.issued
2013-07
dc.identifier.citation
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
dc.identifier.issn
1098-0121
dc.identifier.uri
http://hdl.handle.net/11336/5921
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Rashba
dc.subject
Hubbard
dc.subject
Spin-Hall
dc.subject
Espintronica
dc.subject.classification
Física de los Materiales Condensados
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-27T20:13:17Z
dc.journal.volume
88
dc.journal.number
4
dc.journal.pagination
45102-45102
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
New York
dc.description.fil
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
dc.journal.title
Physical Review B: Condensed Matter and Materials Physics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.88.045102
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.045102
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