Landau-Zener and Rabi oscillations in the spin-dependent conductance
- Autores
- Fernández Alcázar, Lucas Jonatan; Pastawski, Horacio Miguel
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Fil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.
Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.
Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.
Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.
We describe the spin-dependent quantum conductance in a wire where a magnetic field is spatially modulated. The changes in direction and intensity of the magnetic field acts as a perturbation that mixes spin projections. This is exemplified by a ferromagnetic nanowire. There the local field varies smoothly its direction generating a domain wall (DW) as described by the well known Cabrera-Falicov model. Here, we generalize this model to include also a strength modulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneity occurs. 1) If the field strength at the DW is weak enough the local Zeeman energies result in an avoided crossing. Thus, the spin flip probability follows the Landau-Zener formula. 2) For strong fields, the spin-dependent conductance shows oscillations as function of the DW width. We interpret them in terms of Rabi oscillations. Time and length scales obtained from this simplified view show an excellent agreement with the exact dynamical solution of the spin-dependent transport. These results remain valid for other situations involving modulated magnetic structures and thus they open new prospects for the use of quantum interferences in spin-based devices.
http://iopscience.iop.org/0295-5075/105/1/17005
publishedVersion
Fil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.
Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.
Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.
Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.
Física de los Materiales Condensados - Fuente
- issn: 1286-4854
- Materia
-
Magnetoresistencia
Rabi oscillations
Landau-Zener
Spintronics - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- Repositorio
- Institución
- Universidad Nacional de Córdoba
- OAI Identificador
- oai:rdu.unc.edu.ar:11086/20425
Ver los metadatos del registro completo
id |
RDUUNC_d27b767cbaf800b759504045b35b4232 |
---|---|
oai_identifier_str |
oai:rdu.unc.edu.ar:11086/20425 |
network_acronym_str |
RDUUNC |
repository_id_str |
2572 |
network_name_str |
Repositorio Digital Universitario (UNC) |
spelling |
Landau-Zener and Rabi oscillations in the spin-dependent conductanceFernández Alcázar, Lucas JonatanPastawski, Horacio MiguelMagnetoresistenciaRabi oscillationsLandau-ZenerSpintronicsFil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.We describe the spin-dependent quantum conductance in a wire where a magnetic field is spatially modulated. The changes in direction and intensity of the magnetic field acts as a perturbation that mixes spin projections. This is exemplified by a ferromagnetic nanowire. There the local field varies smoothly its direction generating a domain wall (DW) as described by the well known Cabrera-Falicov model. Here, we generalize this model to include also a strength modulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneity occurs. 1) If the field strength at the DW is weak enough the local Zeeman energies result in an avoided crossing. Thus, the spin flip probability follows the Landau-Zener formula. 2) For strong fields, the spin-dependent conductance shows oscillations as function of the DW width. We interpret them in terms of Rabi oscillations. Time and length scales obtained from this simplified view show an excellent agreement with the exact dynamical solution of the spin-dependent transport. These results remain valid for other situations involving modulated magnetic structures and thus they open new prospects for the use of quantum interferences in spin-based devices.http://iopscience.iop.org/0295-5075/105/1/17005publishedVersionFil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.Física de los Materiales Condensados2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfFernández-Alcázar, LJ and HM Pastawski. (2014). Landau-Zener and Rabi oscillations in the spin-dependent conductance. EPL (Europhysics Letters) 105 (1), 17005. https://iopscience.iop.org/article/10.1209/0295-5075/105/17005http://hdl.handle.net/11086/20425http://dx.doi.org/10.1209/0295-5075/105/17005issn: 1286-4854reponame:Repositorio Digital Universitario (UNC)instname:Universidad Nacional de Córdobainstacron:UNCenginfo:eu-repo/semantics/openAccess2025-09-04T12:34:56Zoai:rdu.unc.edu.ar:11086/20425Institucionalhttps://rdu.unc.edu.ar/Universidad públicaNo correspondehttp://rdu.unc.edu.ar/oai/snrdoca.unc@gmail.comArgentinaNo correspondeNo correspondeNo correspondeopendoar:25722025-09-04 12:34:56.275Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdobafalse |
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 Alcázar, Lucas Jonatan Magnetoresistencia Rabi oscillations Landau-Zener 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 Alcázar, Lucas Jonatan Pastawski, Horacio Miguel |
author |
Fernández Alcázar, Lucas Jonatan |
author_facet |
Fernández Alcázar, Lucas Jonatan Pastawski, Horacio Miguel |
author_role |
author |
author2 |
Pastawski, Horacio Miguel |
author2_role |
author |
dc.subject.none.fl_str_mv |
Magnetoresistencia Rabi oscillations Landau-Zener Spintronics |
topic |
Magnetoresistencia Rabi oscillations Landau-Zener Spintronics |
dc.description.none.fl_txt_mv |
Fil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. We describe the spin-dependent quantum conductance in a wire where a magnetic field is spatially modulated. The changes in direction and intensity of the magnetic field acts as a perturbation that mixes spin projections. This is exemplified by a ferromagnetic nanowire. There the local field varies smoothly its direction generating a domain wall (DW) as described by the well known Cabrera-Falicov model. Here, we generalize this model to include also a strength modulation. We identify two striking diabatic regimes that appear when such magnetic inhogeneity occurs. 1) If the field strength at the DW is weak enough the local Zeeman energies result in an avoided crossing. Thus, the spin flip probability follows the Landau-Zener formula. 2) For strong fields, the spin-dependent conductance shows oscillations as function of the DW width. We interpret them in terms of Rabi oscillations. Time and length scales obtained from this simplified view show an excellent agreement with the exact dynamical solution of the spin-dependent transport. These results remain valid for other situations involving modulated magnetic structures and thus they open new prospects for the use of quantum interferences in spin-based devices. http://iopscience.iop.org/0295-5075/105/1/17005 publishedVersion Fil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Fernández Alcázar, Lucas Jonatan. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Pastawski, Horacio Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Pastawski, Horacio Miguel. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Física de los Materiales Condensados |
description |
Fil: Fernández Alcázar, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 |
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 |
Fernández-Alcázar, LJ and HM Pastawski. (2014). Landau-Zener and Rabi oscillations in the spin-dependent conductance. EPL (Europhysics Letters) 105 (1), 17005. https://iopscience.iop.org/article/10.1209/0295-5075/105/17005 http://hdl.handle.net/11086/20425 http://dx.doi.org/10.1209/0295-5075/105/17005 |
identifier_str_mv |
Fernández-Alcázar, LJ and HM Pastawski. (2014). Landau-Zener and Rabi oscillations in the spin-dependent conductance. EPL (Europhysics Letters) 105 (1), 17005. https://iopscience.iop.org/article/10.1209/0295-5075/105/17005 |
url |
http://hdl.handle.net/11086/20425 http://dx.doi.org/10.1209/0295-5075/105/17005 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
issn: 1286-4854 reponame:Repositorio Digital Universitario (UNC) instname:Universidad Nacional de Córdoba instacron:UNC |
reponame_str |
Repositorio Digital Universitario (UNC) |
collection |
Repositorio Digital Universitario (UNC) |
instname_str |
Universidad Nacional de Córdoba |
instacron_str |
UNC |
institution |
UNC |
repository.name.fl_str_mv |
Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdoba |
repository.mail.fl_str_mv |
oca.unc@gmail.com |
_version_ |
1842349687128981504 |
score |
13.13397 |