Ground state structure and conductivity of quantum wires of infinite length and finite width.

We have studied the ground state structure of quantum strips within the local spin-density approximation, for a range of electronic densities between 5 104 and 2 106cm−1 and several strengths of the lateral confining potential. The results have been used to address the conductance G of quantum strip...

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Detalles Bibliográficos
Autores: Malet i Giralt, Francesc, Pi Pericay, Martí, Barranco Gómez, Manuel, Lipparini, Enrico
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2005
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10576
Acceso en línea:https://hdl.handle.net/2445/10576
Access Level:acceso abierto
Palabra clave:Semiconductors
Materials nanoestructurats
Nanostructured materials
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spelling Ground state structure and conductivity of quantum wires of infinite length and finite width.Malet i Giralt, FrancescPi Pericay, MartíBarranco Gómez, ManuelLipparini, EnricoSemiconductorsMaterials nanoestructuratsSemiconductorsNanostructured materialsWe have studied the ground state structure of quantum strips within the local spin-density approximation, for a range of electronic densities between 5 104 and 2 106cm−1 and several strengths of the lateral confining potential. The results have been used to address the conductance G of quantum strips. At low density, when only one subband is occupied, the system is fully polarized and G takes a value close to 0.7 2e2 /h, decreasing with increasing electron density in agreement with experiments. At higher densities the system becomes paramagnetic and G takes a value near 2e2 /h, showing a similar decreasing behavior with increasing electron density. In both cases, the physical parameter that determines the value of the conductance is the ratio K/K0 of the compressibility of the system to the free one.The American Physical Society2005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10576Articles 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.72.205326Physical Review B, 2005, vol. 72, núm. 20, p. 205326-1-205326-10http://dx.doi.org/10.1103/PhysRevB.72.205326(c) The American Physical Society, 2005info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/105762026-05-27T06:46:51Z
dc.title.none.fl_str_mv Ground state structure and conductivity of quantum wires of infinite length and finite width.
title Ground state structure and conductivity of quantum wires of infinite length and finite width.
spellingShingle Ground state structure and conductivity of quantum wires of infinite length and finite width.
Malet i Giralt, Francesc
Semiconductors
Materials nanoestructurats
Semiconductors
Nanostructured materials
title_short Ground state structure and conductivity of quantum wires of infinite length and finite width.
title_full Ground state structure and conductivity of quantum wires of infinite length and finite width.
title_fullStr Ground state structure and conductivity of quantum wires of infinite length and finite width.
title_full_unstemmed Ground state structure and conductivity of quantum wires of infinite length and finite width.
title_sort Ground state structure and conductivity of quantum wires of infinite length and finite width.
dc.creator.none.fl_str_mv Malet i Giralt, Francesc
Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
author Malet i Giralt, Francesc
author_facet Malet i Giralt, Francesc
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 Semiconductors
Materials nanoestructurats
Semiconductors
Nanostructured materials
topic Semiconductors
Materials nanoestructurats
Semiconductors
Nanostructured materials
description We have studied the ground state structure of quantum strips within the local spin-density approximation, for a range of electronic densities between 5 104 and 2 106cm−1 and several strengths of the lateral confining potential. The results have been used to address the conductance G of quantum strips. At low density, when only one subband is occupied, the system is fully polarized and G takes a value close to 0.7 2e2 /h, decreasing with increasing electron density in agreement with experiments. At higher densities the system becomes paramagnetic and G takes a value near 2e2 /h, showing a similar decreasing behavior with increasing electron density. In both cases, the physical parameter that determines the value of the conductance is the ratio K/K0 of the compressibility of the system to the free one.
publishDate 2005
dc.date.none.fl_str_mv 2005
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/2445/10576
url https://hdl.handle.net/2445/10576
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.72.205326
Physical Review B, 2005, vol. 72, núm. 20, p. 205326-1-205326-10
http://dx.doi.org/10.1103/PhysRevB.72.205326
dc.rights.none.fl_str_mv (c) The American Physical Society, 2005
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2005
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 15,300724

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