Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field

Autores
Garagiola, Mariano; Pont, Federico Manuel; Osenda, Omar
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Applying a strong enough magnetic field results in the binding of few-electron resonant states. The mechanism was proposed many years ago but its verification in laboratory conditions is far more recent. In this work we study the binding of two-electron resonant states. The electrons are confined in a cylindrical quantum dot which is embedded in a semiconductor wire. The geometry considered is similar to the one used in actual experimental setups. The low-energy two-electron spectrum is calculated numerically from an effective-mass approximation Hamiltonian modelling the system. Methods for binding threshold calculations in systems with one and two electrons are thoroughly studied; in particular, we use quantum information quantities to assess when the strong lateral confinement approximation can be used to obtain reliable low-energy spectra. For simplicity, only cases without bound states in the absence of an external field are considered. Under these conditions, the binding threshold for the one-electron case is given by the lowest Landau energy level. Moreover, the energy of the one-electron bounded resonance can be used to obtain the two-electron binding threshold. It is shown that for realistic values of the two-electron model parameters it is feasible to bind resonances with field strengths of a few tens of tesla.
Fil: Garagiola, Mariano. Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, Córdoba; Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Física Enrique Gaviola, Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Pont, Federico Manuel. 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: Osenda, Omar. 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
Materia
MECÁNICA CUÁNTICA
PUNTOS CUÁNTICOS
ESTADOS RESONANTES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/91691
Acceder
id CONICETDig_e8e209c095a7270ebc8601d208f51bbd
oai_identifier_str oai:ri.conicet.gov.ar:11336/91691
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Binding of two-electron metastable states in semiconductor quantum dots under a magnetic fieldGaragiola, MarianoPont, Federico ManuelOsenda, OmarMECÁNICA CUÁNTICAPUNTOS CUÁNTICOSESTADOS RESONANTEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Applying a strong enough magnetic field results in the binding of few-electron resonant states. The mechanism was proposed many years ago but its verification in laboratory conditions is far more recent. In this work we study the binding of two-electron resonant states. The electrons are confined in a cylindrical quantum dot which is embedded in a semiconductor wire. The geometry considered is similar to the one used in actual experimental setups. The low-energy two-electron spectrum is calculated numerically from an effective-mass approximation Hamiltonian modelling the system. Methods for binding threshold calculations in systems with one and two electrons are thoroughly studied; in particular, we use quantum information quantities to assess when the strong lateral confinement approximation can be used to obtain reliable low-energy spectra. For simplicity, only cases without bound states in the absence of an external field are considered. Under these conditions, the binding threshold for the one-electron case is given by the lowest Landau energy level. Moreover, the energy of the one-electron bounded resonance can be used to obtain the two-electron binding threshold. It is shown that for realistic values of the two-electron model parameters it is feasible to bind resonances with field strengths of a few tens of tesla.Fil: Garagiola, Mariano. Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, Córdoba; Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Física Enrique Gaviola, Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Pont, Federico Manuel. 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: Osenda, Omar. 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; ArgentinaIOP Publishing2018-03-16info: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/11336/91691Garagiola, Mariano; Pont, Federico Manuel; Osenda, Omar; Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field; IOP Publishing; Journal of Physics B: Atomic, Molecular and Optical Physics; 51; 7; 16-3-2018; 1-230953-4075CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1361-6455/aab1a0info:eu-repo/semantics/altIdentifier/doi/10.1088/1361-6455/aab1a0info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:54Zoai:ri.conicet.gov.ar:11336/91691instacron: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:34982025-09-29 09:37:55.032CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
title Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
spellingShingle Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
Garagiola, Mariano
MECÁNICA CUÁNTICA
PUNTOS CUÁNTICOS
ESTADOS RESONANTES
title_short Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
title_full Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
title_fullStr Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
title_full_unstemmed Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
title_sort Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field
dc.creator.none.fl_str_mv Garagiola, Mariano
Pont, Federico Manuel
Osenda, Omar
author Garagiola, Mariano
author_facet Garagiola, Mariano
Pont, Federico Manuel
Osenda, Omar
author_role author
author2 Pont, Federico Manuel
Osenda, Omar
author2_role author
author
dc.subject.none.fl_str_mv MECÁNICA CUÁNTICA
PUNTOS CUÁNTICOS
ESTADOS RESONANTES
topic MECÁNICA CUÁNTICA
PUNTOS CUÁNTICOS
ESTADOS RESONANTES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Applying a strong enough magnetic field results in the binding of few-electron resonant states. The mechanism was proposed many years ago but its verification in laboratory conditions is far more recent. In this work we study the binding of two-electron resonant states. The electrons are confined in a cylindrical quantum dot which is embedded in a semiconductor wire. The geometry considered is similar to the one used in actual experimental setups. The low-energy two-electron spectrum is calculated numerically from an effective-mass approximation Hamiltonian modelling the system. Methods for binding threshold calculations in systems with one and two electrons are thoroughly studied; in particular, we use quantum information quantities to assess when the strong lateral confinement approximation can be used to obtain reliable low-energy spectra. For simplicity, only cases without bound states in the absence of an external field are considered. Under these conditions, the binding threshold for the one-electron case is given by the lowest Landau energy level. Moreover, the energy of the one-electron bounded resonance can be used to obtain the two-electron binding threshold. It is shown that for realistic values of the two-electron model parameters it is feasible to bind resonances with field strengths of a few tens of tesla.
Fil: Garagiola, Mariano. Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, Córdoba; Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Física Enrique Gaviola, Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Pont, Federico Manuel. 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: Osenda, Omar. 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
description Applying a strong enough magnetic field results in the binding of few-electron resonant states. The mechanism was proposed many years ago but its verification in laboratory conditions is far more recent. In this work we study the binding of two-electron resonant states. The electrons are confined in a cylindrical quantum dot which is embedded in a semiconductor wire. The geometry considered is similar to the one used in actual experimental setups. The low-energy two-electron spectrum is calculated numerically from an effective-mass approximation Hamiltonian modelling the system. Methods for binding threshold calculations in systems with one and two electrons are thoroughly studied; in particular, we use quantum information quantities to assess when the strong lateral confinement approximation can be used to obtain reliable low-energy spectra. For simplicity, only cases without bound states in the absence of an external field are considered. Under these conditions, the binding threshold for the one-electron case is given by the lowest Landau energy level. Moreover, the energy of the one-electron bounded resonance can be used to obtain the two-electron binding threshold. It is shown that for realistic values of the two-electron model parameters it is feasible to bind resonances with field strengths of a few tens of tesla.
publishDate 2018
dc.date.none.fl_str_mv 2018-03-16
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/11336/91691
Garagiola, Mariano; Pont, Federico Manuel; Osenda, Omar; Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field; IOP Publishing; Journal of Physics B: Atomic, Molecular and Optical Physics; 51; 7; 16-3-2018; 1-23
0953-4075
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91691
identifier_str_mv Garagiola, Mariano; Pont, Federico Manuel; Osenda, Omar; Binding of two-electron metastable states in semiconductor quantum dots under a magnetic field; IOP Publishing; Journal of Physics B: Atomic, Molecular and Optical Physics; 51; 7; 16-3-2018; 1-23
0953-4075
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1361-6455/aab1a0
info:eu-repo/semantics/altIdentifier/doi/10.1088/1361-6455/aab1a0
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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
_version_ 1844613196507250688
score 13.070432

Publicaciones similares