Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas

The longitudinal polarization function of a quasi-one-dimensional electron gas (Q1DEG) confined in a semiconductor quantum well wire (QWW) is given in the random-phase approximation (RPA) for the cases where T = 0 K and T not equal 0 K, taking into account the lack of spatial invariance in the plane...

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Detalles Bibliográficos
Autores: Tutor-Sánchez, J, Rodríguez-Coppola, H, Rodríguez-Romo, S
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1998
País:México
Institución:Universidad Nacional Autónoma de México
Repositorio:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/2724
Acceso en línea:http://hdl.handle.net/11154/2724
Access Level:acceso abierto
Palabra clave:Physics, Condensed Matter
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spelling Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gasTutor-Sánchez, JRodríguez-Coppola, HRodríguez-Romo, SPhysics, Condensed MatterThe longitudinal polarization function of a quasi-one-dimensional electron gas (Q1DEG) confined in a semiconductor quantum well wire (QWW) is given in the random-phase approximation (RPA) for the cases where T = 0 K and T not equal 0 K, taking into account the lack of spatial invariance in the plane of the cross-section of the QWW. it is given as a sum of terms in the form of a spatial function, composed from the wavefunctions, and their complex conjugates, of two single-electron states and the polarizability for each allowed transition. The polarizability for a given transition is studied in terms of its frequency, momentum and temperature dependences, relating its behaviour with the electronic topological transition occurring in the Fermi domain. The results are analysed by representing the electron gas involved in the transition as composed from two quasi-particle subgases with different effective masses within the conduction band as an excitonic gas.2011-01-22T10:27:47Z2011-01-22T10:27:47Z1998info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article0953-8984http://hdl.handle.net/11154/2724278110(44):9999-10010reponame:Sistema de Información de la Facultad de Ciencias, UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenJournal of Physics-Condensed Matterinfo:eu-repo/semantics/openAccessoai:repositorio.fciencias.unam.mx:11154/27242025-09-17T19:21:15Z
dc.title.none.fl_str_mv Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
title Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
spellingShingle Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
Tutor-Sánchez, J
Physics, Condensed Matter
title_short Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
title_full Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
title_fullStr Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
title_full_unstemmed Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
title_sort Longitudinal polarizability and the electronic topological transitions in a quasi-one-dimensional electron gas
dc.creator.none.fl_str_mv Tutor-Sánchez, J
Rodríguez-Coppola, H
Rodríguez-Romo, S
author Tutor-Sánchez, J
author_facet Tutor-Sánchez, J
Rodríguez-Coppola, H
Rodríguez-Romo, S
author_role author
author2 Rodríguez-Coppola, H
Rodríguez-Romo, S
author2_role author
author
dc.subject.none.fl_str_mv Physics, Condensed Matter
topic Physics, Condensed Matter
description The longitudinal polarization function of a quasi-one-dimensional electron gas (Q1DEG) confined in a semiconductor quantum well wire (QWW) is given in the random-phase approximation (RPA) for the cases where T = 0 K and T not equal 0 K, taking into account the lack of spatial invariance in the plane of the cross-section of the QWW. it is given as a sum of terms in the form of a spatial function, composed from the wavefunctions, and their complex conjugates, of two single-electron states and the polarizability for each allowed transition. The polarizability for a given transition is studied in terms of its frequency, momentum and temperature dependences, relating its behaviour with the electronic topological transition occurring in the Fermi domain. The results are analysed by representing the electron gas involved in the transition as composed from two quasi-particle subgases with different effective masses within the conduction band as an excitonic gas.
publishDate 1998
dc.date.none.fl_str_mv 1998
2011-01-22T10:27:47Z
2011-01-22T10:27:47Z
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.none.fl_str_mv 0953-8984
http://hdl.handle.net/11154/2724
2781
identifier_str_mv 0953-8984
2781
url http://hdl.handle.net/11154/2724
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv Journal of Physics-Condensed Matter
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv 10(44):9999-10010
reponame:Sistema de Información de la Facultad de Ciencias, UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
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institution UNAM
reponame_str Sistema de Información de la Facultad de Ciencias, UNAM
collection Sistema de Información de la Facultad de Ciencias, UNAM
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