Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects

Detalhes bibliográficos
Autor(a) principal: Bruno-Alfonso, A. [UNESP]
Data de Publicação: 2005
Outros Autores: Latgé, A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevB.71.125312
http://hdl.handle.net/11449/224560
Resumo: The effects of an in-plane electric field and eccentricity on the electronic spectrum of a GaAs quantum ring in a perpendicular magnetic field are studied. The effective-mass equation is solved by two different methods: an adiabatic approximation and a diagonalization procedure after a conformal mapping. It is shown that the electric field and the eccentricity may suppress the Aharonov-Bohm oscillations of the lower energy levels. Simple expressions for the threshold energy and the number of flat energy bands are found. In the case of a thin and eccentric ring, the intensity of a critical field which compensates the main effects of eccentricity is determined. The energy spectra are found in qualitative agreement with previous experimental and theoretical works on anisotropic rings. ©2005 The American Physical Society.
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spelling Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effectsThe effects of an in-plane electric field and eccentricity on the electronic spectrum of a GaAs quantum ring in a perpendicular magnetic field are studied. The effective-mass equation is solved by two different methods: an adiabatic approximation and a diagonalization procedure after a conformal mapping. It is shown that the electric field and the eccentricity may suppress the Aharonov-Bohm oscillations of the lower energy levels. Simple expressions for the threshold energy and the number of flat energy bands are found. In the case of a thin and eccentric ring, the intensity of a critical field which compensates the main effects of eccentricity is determined. The energy spectra are found in qualitative agreement with previous experimental and theoretical works on anisotropic rings. ©2005 The American Physical Society.Departamento de Matemática Faculdade de Ciências UNESP-Universidade Estadual Paulista, Ave. Luiz Edmundo Carrijo Coube sn, 17033-360, Bauru-São PauloInstituto de Física UFF-Universidade Federal Fluminense, Avenida Litorânea sn, 24210-340, Niterói-RJDepartamento de Matemática Faculdade de Ciências UNESP-Universidade Estadual Paulista, Ave. Luiz Edmundo Carrijo Coube sn, 17033-360, Bauru-São PauloUniversidade Estadual Paulista (UNESP)Universidade Federal Fluminense (UFF)Bruno-Alfonso, A. [UNESP]Latgé, A.2022-04-28T20:00:46Z2022-04-28T20:00:46Z2005-03-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevB.71.125312Physical Review B - Condensed Matter and Materials Physics, v. 71, n. 12, 2005.1098-01211550-235Xhttp://hdl.handle.net/11449/22456010.1103/PhysRevB.71.1253122-s2.0-20044393897Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physicsinfo:eu-repo/semantics/openAccess2024-04-29T14:59:54Zoai:repositorio.unesp.br:11449/224560Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:40:10.852479Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
title Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
spellingShingle Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
Bruno-Alfonso, A. [UNESP]
title_short Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
title_full Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
title_fullStr Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
title_full_unstemmed Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
title_sort Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects
author Bruno-Alfonso, A. [UNESP]
author_facet Bruno-Alfonso, A. [UNESP]
Latgé, A.
author_role author
author2 Latgé, A.
author2_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Universidade Federal Fluminense (UFF)
dc.contributor.author.fl_str_mv Bruno-Alfonso, A. [UNESP]
Latgé, A.
description The effects of an in-plane electric field and eccentricity on the electronic spectrum of a GaAs quantum ring in a perpendicular magnetic field are studied. The effective-mass equation is solved by two different methods: an adiabatic approximation and a diagonalization procedure after a conformal mapping. It is shown that the electric field and the eccentricity may suppress the Aharonov-Bohm oscillations of the lower energy levels. Simple expressions for the threshold energy and the number of flat energy bands are found. In the case of a thin and eccentric ring, the intensity of a critical field which compensates the main effects of eccentricity is determined. The energy spectra are found in qualitative agreement with previous experimental and theoretical works on anisotropic rings. ©2005 The American Physical Society.
publishDate 2005
dc.date.none.fl_str_mv 2005-03-15
2022-04-28T20:00:46Z
2022-04-28T20:00:46Z
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/10.1103/PhysRevB.71.125312
Physical Review B - Condensed Matter and Materials Physics, v. 71, n. 12, 2005.
1098-0121
1550-235X
http://hdl.handle.net/11449/224560
10.1103/PhysRevB.71.125312
2-s2.0-20044393897
url http://dx.doi.org/10.1103/PhysRevB.71.125312
http://hdl.handle.net/11449/224560
identifier_str_mv Physical Review B - Condensed Matter and Materials Physics, v. 71, n. 12, 2005.
1098-0121
1550-235X
10.1103/PhysRevB.71.125312
2-s2.0-20044393897
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physical Review B - Condensed Matter and Materials Physics
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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
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