Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings

We present a systematic study of ground state and spectroscopic properties of many-electron nanoscopic quantum rings. Addition energies at zero magnetic field (B) and electrochemical potentials as a function of B are given for a ring hosting up to 24 electrons. We find discontinuities in the excitat...

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Detalles Bibliográficos
Autores: Emperador, Agustí, Pi Pericay, Martí, Barranco Gómez, Manuel, Lipparini, Enrico
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2001
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10498
Acceso en línea:https://hdl.handle.net/2445/10498
Access Level:acceso abierto
Palabra clave:Espectroscòpia Raman
Semiconductors
Raman spectroscopy
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spelling Multipole modes and spin features in the Raman spectrum of nanoscopic quantum ringsEmperador, AgustíPi Pericay, MartíBarranco Gómez, ManuelLipparini, EnricoEspectroscòpia RamanSemiconductorsRaman spectroscopySemiconductorsWe present a systematic study of ground state and spectroscopic properties of many-electron nanoscopic quantum rings. Addition energies at zero magnetic field (B) and electrochemical potentials as a function of B are given for a ring hosting up to 24 electrons. We find discontinuities in the excitation energies of multipole spin and charge density modes, and a coupling between the charge and spin density responses that allow to identify the formation of ferromagnetic ground states in narrow magnetic field regions. These effects can be observed in Raman experiments, and are related to the fractional Aharonov-Bohm oscillations of the energy and of the persistent current in the ringThe American Physical Society2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10498Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.64.155304Physical Review B, 2001, vol. 64, núm. 15, p. 155304(1)-155304(9)http://dx.doi.org/10.1103/PhysRevB.64.155304(c) The American Physical Society, 2001info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/104982026-05-27T06:46:51Z
dc.title.none.fl_str_mv Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
title Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
spellingShingle Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
Emperador, Agustí
Espectroscòpia Raman
Semiconductors
Raman spectroscopy
Semiconductors
title_short Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
title_full Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
title_fullStr Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
title_full_unstemmed Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
title_sort Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings
dc.creator.none.fl_str_mv Emperador, Agustí
Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
author Emperador, Agustí
author_facet Emperador, Agustí
Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
author_role author
author2 Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
author2_role author
author
author
dc.subject.none.fl_str_mv Espectroscòpia Raman
Semiconductors
Raman spectroscopy
Semiconductors
topic Espectroscòpia Raman
Semiconductors
Raman spectroscopy
Semiconductors
description We present a systematic study of ground state and spectroscopic properties of many-electron nanoscopic quantum rings. Addition energies at zero magnetic field (B) and electrochemical potentials as a function of B are given for a ring hosting up to 24 electrons. We find discontinuities in the excitation energies of multipole spin and charge density modes, and a coupling between the charge and spin density responses that allow to identify the formation of ferromagnetic ground states in narrow magnetic field regions. These effects can be observed in Raman experiments, and are related to the fractional Aharonov-Bohm oscillations of the energy and of the persistent current in the ring
publishDate 2001
dc.date.none.fl_str_mv 2001
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/10498
url https://hdl.handle.net/2445/10498
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.64.155304
Physical Review B, 2001, vol. 64, núm. 15, p. 155304(1)-155304(9)
http://dx.doi.org/10.1103/PhysRevB.64.155304
dc.rights.none.fl_str_mv (c) The American Physical Society, 2001
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2001
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,298079

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