Landau-Zener and Rabi oscillations in the spin-dependent conductance
- Autores
- Fernández, Lucas Jonatan; Pastawski, Horacio Miguel
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We describe the spin-dependent quantum conductance in a wire where a magnetic eld is spatially modulated. The change in direction and intensity of the magnetic eld acts as aperturbation that mixes spin projections. This is exempli ed by a ferromagnetic nanowire. Therethe local eld varies smoothly its direction generating a domain wall (DW) as described by thewell-known Cabrera-Falicov model. Here, we generalize this model to include also a strength mod-ulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneityoccurs. 1) If the eld strength at the DW is weak enough, the local Zeeman energies result in anavoided crossing. Thus, the spin- ip probability follows the Landau-Zener formula. 2) For strong elds, the spin-dependent conductance shows oscillations as a function of the DW width. Weinterpret them in terms of Rabi oscillations. Time and length scales obtained from this simpli edview show an excellent agreement with the exact dynamical solution of the spin-dependent trans-port. These results remain valid for other situations involving modulated magnetic structures andthus they open new prospects for the use of quantum interferences in spin-based devices.
Fil: Fernández, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina - Materia
-
Spin polarized transport
Magnetoelectronics
spintronics - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/31829
Ver los metadatos del registro completo
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Landau-Zener and Rabi oscillations in the spin-dependent conductanceFernández, Lucas JonatanPastawski, Horacio MiguelSpin polarized transportMagnetoelectronicsspintronicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We describe the spin-dependent quantum conductance in a wire where a magnetic eld is spatially modulated. The change in direction and intensity of the magnetic eld acts as aperturbation that mixes spin projections. This is exempli ed by a ferromagnetic nanowire. Therethe local eld varies smoothly its direction generating a domain wall (DW) as described by thewell-known Cabrera-Falicov model. Here, we generalize this model to include also a strength mod-ulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneityoccurs. 1) If the eld strength at the DW is weak enough, the local Zeeman energies result in anavoided crossing. Thus, the spin- ip probability follows the Landau-Zener formula. 2) For strong elds, the spin-dependent conductance shows oscillations as a function of the DW width. Weinterpret them in terms of Rabi oscillations. Time and length scales obtained from this simpli edview show an excellent agreement with the exact dynamical solution of the spin-dependent trans-port. These results remain valid for other situations involving modulated magnetic structures andthus they open new prospects for the use of quantum interferences in spin-based devices.Fil: Fernández, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaEurophysics Letters2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31829Pastawski, Horacio Miguel; Fernández, Lucas Jonatan; Landau-Zener and Rabi oscillations in the spin-dependent conductance; Europhysics Letters; Europhysics Letters; 105; 1-2014; 17005-170110295-5075CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1209/0295-5075/105/17005/metainfo:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/105/17005info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:44Zoai:ri.conicet.gov.ar:11336/31829instacron: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:34982025-09-03 10:04:44.456CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
title |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
spellingShingle |
Landau-Zener and Rabi oscillations in the spin-dependent conductance Fernández, Lucas Jonatan Spin polarized transport Magnetoelectronics spintronics |
title_short |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
title_full |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
title_fullStr |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
title_full_unstemmed |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
title_sort |
Landau-Zener and Rabi oscillations in the spin-dependent conductance |
dc.creator.none.fl_str_mv |
Fernández, Lucas Jonatan Pastawski, Horacio Miguel |
author |
Fernández, Lucas Jonatan |
author_facet |
Fernández, Lucas Jonatan Pastawski, Horacio Miguel |
author_role |
author |
author2 |
Pastawski, Horacio Miguel |
author2_role |
author |
dc.subject.none.fl_str_mv |
Spin polarized transport Magnetoelectronics spintronics |
topic |
Spin polarized transport Magnetoelectronics spintronics |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We describe the spin-dependent quantum conductance in a wire where a magnetic eld is spatially modulated. The change in direction and intensity of the magnetic eld acts as aperturbation that mixes spin projections. This is exempli ed by a ferromagnetic nanowire. Therethe local eld varies smoothly its direction generating a domain wall (DW) as described by thewell-known Cabrera-Falicov model. Here, we generalize this model to include also a strength mod-ulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneityoccurs. 1) If the eld strength at the DW is weak enough, the local Zeeman energies result in anavoided crossing. Thus, the spin- ip probability follows the Landau-Zener formula. 2) For strong elds, the spin-dependent conductance shows oscillations as a function of the DW width. Weinterpret them in terms of Rabi oscillations. Time and length scales obtained from this simpli edview show an excellent agreement with the exact dynamical solution of the spin-dependent trans-port. These results remain valid for other situations involving modulated magnetic structures andthus they open new prospects for the use of quantum interferences in spin-based devices. Fil: Fernández, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina |
description |
We describe the spin-dependent quantum conductance in a wire where a magnetic eld is spatially modulated. The change in direction and intensity of the magnetic eld acts as aperturbation that mixes spin projections. This is exempli ed by a ferromagnetic nanowire. Therethe local eld varies smoothly its direction generating a domain wall (DW) as described by thewell-known Cabrera-Falicov model. Here, we generalize this model to include also a strength mod-ulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneityoccurs. 1) If the eld strength at the DW is weak enough, the local Zeeman energies result in anavoided crossing. Thus, the spin- ip probability follows the Landau-Zener formula. 2) For strong elds, the spin-dependent conductance shows oscillations as a function of the DW width. Weinterpret them in terms of Rabi oscillations. Time and length scales obtained from this simpli edview show an excellent agreement with the exact dynamical solution of the spin-dependent trans-port. These results remain valid for other situations involving modulated magnetic structures andthus they open new prospects for the use of quantum interferences in spin-based devices. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01 |
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/11336/31829 Pastawski, Horacio Miguel; Fernández, Lucas Jonatan; Landau-Zener and Rabi oscillations in the spin-dependent conductance; Europhysics Letters; Europhysics Letters; 105; 1-2014; 17005-17011 0295-5075 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/31829 |
identifier_str_mv |
Pastawski, Horacio Miguel; Fernández, Lucas Jonatan; Landau-Zener and Rabi oscillations in the spin-dependent conductance; Europhysics Letters; Europhysics Letters; 105; 1-2014; 17005-17011 0295-5075 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://iopscience.iop.org/article/10.1209/0295-5075/105/17005/meta info:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/105/17005 |
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 application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Europhysics Letters |
publisher.none.fl_str_mv |
Europhysics Letters |
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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1842269872885596160 |
score |
13.13397 |