Transport through hybrid superconducting/ferromagnetic double-path junction
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.physleta.2016.11.038 http://hdl.handle.net/11449/169286 |
Resumo: | In this paper we study a double-path junction formed by a ferromagnetic and a superconductor lead. The first path connects the superconductor and ferromagnet directly while the second path connects these metals through a quantum dot. The whole system works as an Aharonov–Bohm interferometer allowing the study of the interference between these two paths under the presence of spin imbalance and Andreev bound states. We considered the effect of Fano interference on the electronic transmittance through the quantum dot and observed two regimes of conduction depending on the strength of the direct coupling. For the weak coupling regime, the transmittance presented the usual four resonances due to the Andreev bound states whereas for the strong coupling regime the profile was inverted and resonances became anti-resonances. However, even in the strong coupling regime it was possible to observe a central resonance due to the interference between the Andreev bound states. We have also studied the signatures of Fano interference on the average occupation within the quantum dot. The spin accumulation was analyzed and how it depends on the direct coupling and an external magnetic field applied to the system. The results obtained may be used in a possible experimental implementation of this system in order to probe spin related effects in ferromagnetic superconductor nanostructures. |
id |
UNSP_77d3b56faebef370a165c55a7cae5f77 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/169286 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Transport through hybrid superconducting/ferromagnetic double-path junctionAharonov–BohmAndreev transportFerromagnetismQuantum dotSuperconductivityIn this paper we study a double-path junction formed by a ferromagnetic and a superconductor lead. The first path connects the superconductor and ferromagnet directly while the second path connects these metals through a quantum dot. The whole system works as an Aharonov–Bohm interferometer allowing the study of the interference between these two paths under the presence of spin imbalance and Andreev bound states. We considered the effect of Fano interference on the electronic transmittance through the quantum dot and observed two regimes of conduction depending on the strength of the direct coupling. For the weak coupling regime, the transmittance presented the usual four resonances due to the Andreev bound states whereas for the strong coupling regime the profile was inverted and resonances became anti-resonances. However, even in the strong coupling regime it was possible to observe a central resonance due to the interference between the Andreev bound states. We have also studied the signatures of Fano interference on the average occupation within the quantum dot. The spin accumulation was analyzed and how it depends on the direct coupling and an external magnetic field applied to the system. The results obtained may be used in a possible experimental implementation of this system in order to probe spin related effects in ferromagnetic superconductor nanostructures.Fondo Nacional de Desarrollo Cient�fico y Tecnol�gicoComisi�n Nacional de Investigaci�n Cient�fica y Tecnol�gicaDepartamento de F�sica e Qu�mica Universidade Estadual Paulista – UNESPDepartamento de F�sica Universidad T�cnica Federico Santa Maria, Av. Vicu�a MackennaDepartamento de F�sica Universidade Estadual de Ponta Grossa – UEPGInstituto de F�sica Universidade Federal FluminenseInstituto de F�sica ‘Gleb Wataghin’ Universidade Estadual de Campinas – UNICAMPDepartamento de F�sica Universidade Tecnol�gica Federal do Paran� – UTFPRDepartamento de F�sica e Qu�mica Universidade Estadual Paulista – UNESPFondo Nacional de Desarrollo Cient�fico y Tecnol�gico: 1140571Comisi�n Nacional de Investigaci�n Cient�fica y Tecnol�gica: ACT 1204Universidade Estadual Paulista (Unesp)Universidad T�cnica Federico Santa MariaUniversidade Estadual de Ponta Grossa (UEPG)Universidade Federal Fluminense (UFF)Universidade Estadual de Campinas (UNICAMP)Universidade Tecnol�gica Federal do Paran� – UTFPRFacio, T. J.S. [UNESP]Orellana, P. A.Jurelo, A. R.Figueira, M. S.Cabrera, G. G.Siqueira, E. C.2018-12-11T16:45:13Z2018-12-11T16:45:13Z2017-02-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article529-534application/pdfhttp://dx.doi.org/10.1016/j.physleta.2016.11.038Physics Letters, Section A: General, Atomic and Solid State Physics, v. 381, n. 5, p. 529-534, 2017.0375-9601http://hdl.handle.net/11449/16928610.1016/j.physleta.2016.11.0382-s2.0-850073184212-s2.0-85007318421.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysics Letters, Section A: General, Atomic and Solid State Physics0,595info:eu-repo/semantics/openAccess2023-12-29T06:18:11Zoai:repositorio.unesp.br:11449/169286Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-29T06:18:11Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Transport through hybrid superconducting/ferromagnetic double-path junction |
title |
Transport through hybrid superconducting/ferromagnetic double-path junction |
spellingShingle |
Transport through hybrid superconducting/ferromagnetic double-path junction Facio, T. J.S. [UNESP] Aharonov–Bohm Andreev transport Ferromagnetism Quantum dot Superconductivity |
title_short |
Transport through hybrid superconducting/ferromagnetic double-path junction |
title_full |
Transport through hybrid superconducting/ferromagnetic double-path junction |
title_fullStr |
Transport through hybrid superconducting/ferromagnetic double-path junction |
title_full_unstemmed |
Transport through hybrid superconducting/ferromagnetic double-path junction |
title_sort |
Transport through hybrid superconducting/ferromagnetic double-path junction |
author |
Facio, T. J.S. [UNESP] |
author_facet |
Facio, T. J.S. [UNESP] Orellana, P. A. Jurelo, A. R. Figueira, M. S. Cabrera, G. G. Siqueira, E. C. |
author_role |
author |
author2 |
Orellana, P. A. Jurelo, A. R. Figueira, M. S. Cabrera, G. G. Siqueira, E. C. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidad T�cnica Federico Santa Maria Universidade Estadual de Ponta Grossa (UEPG) Universidade Federal Fluminense (UFF) Universidade Estadual de Campinas (UNICAMP) Universidade Tecnol�gica Federal do Paran� – UTFPR |
dc.contributor.author.fl_str_mv |
Facio, T. J.S. [UNESP] Orellana, P. A. Jurelo, A. R. Figueira, M. S. Cabrera, G. G. Siqueira, E. C. |
dc.subject.por.fl_str_mv |
Aharonov–Bohm Andreev transport Ferromagnetism Quantum dot Superconductivity |
topic |
Aharonov–Bohm Andreev transport Ferromagnetism Quantum dot Superconductivity |
description |
In this paper we study a double-path junction formed by a ferromagnetic and a superconductor lead. The first path connects the superconductor and ferromagnet directly while the second path connects these metals through a quantum dot. The whole system works as an Aharonov–Bohm interferometer allowing the study of the interference between these two paths under the presence of spin imbalance and Andreev bound states. We considered the effect of Fano interference on the electronic transmittance through the quantum dot and observed two regimes of conduction depending on the strength of the direct coupling. For the weak coupling regime, the transmittance presented the usual four resonances due to the Andreev bound states whereas for the strong coupling regime the profile was inverted and resonances became anti-resonances. However, even in the strong coupling regime it was possible to observe a central resonance due to the interference between the Andreev bound states. We have also studied the signatures of Fano interference on the average occupation within the quantum dot. The spin accumulation was analyzed and how it depends on the direct coupling and an external magnetic field applied to the system. The results obtained may be used in a possible experimental implementation of this system in order to probe spin related effects in ferromagnetic superconductor nanostructures. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-02-05 2018-12-11T16:45:13Z 2018-12-11T16:45:13Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.physleta.2016.11.038 Physics Letters, Section A: General, Atomic and Solid State Physics, v. 381, n. 5, p. 529-534, 2017. 0375-9601 http://hdl.handle.net/11449/169286 10.1016/j.physleta.2016.11.038 2-s2.0-85007318421 2-s2.0-85007318421.pdf |
url |
http://dx.doi.org/10.1016/j.physleta.2016.11.038 http://hdl.handle.net/11449/169286 |
identifier_str_mv |
Physics Letters, Section A: General, Atomic and Solid State Physics, v. 381, n. 5, p. 529-534, 2017. 0375-9601 10.1016/j.physleta.2016.11.038 2-s2.0-85007318421 2-s2.0-85007318421.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physics Letters, Section A: General, Atomic and Solid State Physics 0,595 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
529-534 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803047168008781824 |