Modulation of charge-density waves by superlattice structures
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.73.193407 http://hdl.handle.net/11449/224759 |
Resumo: | We discuss the interplay between electronic correlations and an underlying superlattice structure in determining the period of charge density waves (CDW's), by considering a one-dimensional Hubbard model with a repeated (nonrandom) pattern of repulsive (U>0) and free (U=0) sites. Density matrix renormalization group diagonalization of finite systems (up to 120 sites) is used to calculate the charge-density correlation function and structure factor in the ground state. The modulation period can still be predicted through effective Fermi wave vectors kF* and densities, and we have found that it is much more sensitive to electron (or hole) doping, both because of the narrow range of densities needed to go from q* =0 to π, but also due to sharp 2 kF* -4 kF* transitions; these features render CDW's more versatile for actual applications in heterostructures than in homogeneous systems. © 2006 The American Physical Society. |
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Repositório Institucional da UNESP |
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Modulation of charge-density waves by superlattice structuresWe discuss the interplay between electronic correlations and an underlying superlattice structure in determining the period of charge density waves (CDW's), by considering a one-dimensional Hubbard model with a repeated (nonrandom) pattern of repulsive (U>0) and free (U=0) sites. Density matrix renormalization group diagonalization of finite systems (up to 120 sites) is used to calculate the charge-density correlation function and structure factor in the ground state. The modulation period can still be predicted through effective Fermi wave vectors kF* and densities, and we have found that it is much more sensitive to electron (or hole) doping, both because of the narrow range of densities needed to go from q* =0 to π, but also due to sharp 2 kF* -4 kF* transitions; these features render CDW's more versatile for actual applications in heterostructures than in homogeneous systems. © 2006 The American Physical Society.Departamento de Física Faculdade de Ciências Universidade Estadual Paulista, Caixa Postal 473, 17015-970 Bauru SPInstituto de Física Universidade Federal Do Rio de Janeiro, Caixa Postal 68528, 21941-972 Rio de Janeiro, RJDepartamento de Física Faculdade de Ciências Universidade Estadual Paulista, Caixa Postal 473, 17015-970 Bauru SPUniversidade Estadual Paulista (UNESP)Universidade Federal do Rio de Janeiro (UFRJ)Malvezzi, André L. [UNESP]Paiva, TherezaDos Santos, Raimundo R.2022-04-28T20:07:44Z2022-04-28T20:07:44Z2006-05-31info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevB.73.193407Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 19, 2006.1098-01211550-235Xhttp://hdl.handle.net/11449/22475910.1103/PhysRevB.73.1934072-s2.0-33646866606Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physicsinfo:eu-repo/semantics/openAccess2024-04-25T17:40:30Zoai:repositorio.unesp.br:11449/224759Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-25T17:40:30Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Modulation of charge-density waves by superlattice structures |
title |
Modulation of charge-density waves by superlattice structures |
spellingShingle |
Modulation of charge-density waves by superlattice structures Malvezzi, André L. [UNESP] |
title_short |
Modulation of charge-density waves by superlattice structures |
title_full |
Modulation of charge-density waves by superlattice structures |
title_fullStr |
Modulation of charge-density waves by superlattice structures |
title_full_unstemmed |
Modulation of charge-density waves by superlattice structures |
title_sort |
Modulation of charge-density waves by superlattice structures |
author |
Malvezzi, André L. [UNESP] |
author_facet |
Malvezzi, André L. [UNESP] Paiva, Thereza Dos Santos, Raimundo R. |
author_role |
author |
author2 |
Paiva, Thereza Dos Santos, Raimundo R. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal do Rio de Janeiro (UFRJ) |
dc.contributor.author.fl_str_mv |
Malvezzi, André L. [UNESP] Paiva, Thereza Dos Santos, Raimundo R. |
description |
We discuss the interplay between electronic correlations and an underlying superlattice structure in determining the period of charge density waves (CDW's), by considering a one-dimensional Hubbard model with a repeated (nonrandom) pattern of repulsive (U>0) and free (U=0) sites. Density matrix renormalization group diagonalization of finite systems (up to 120 sites) is used to calculate the charge-density correlation function and structure factor in the ground state. The modulation period can still be predicted through effective Fermi wave vectors kF* and densities, and we have found that it is much more sensitive to electron (or hole) doping, both because of the narrow range of densities needed to go from q* =0 to π, but also due to sharp 2 kF* -4 kF* transitions; these features render CDW's more versatile for actual applications in heterostructures than in homogeneous systems. © 2006 The American Physical Society. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-05-31 2022-04-28T20:07:44Z 2022-04-28T20:07:44Z |
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.73.193407 Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 19, 2006. 1098-0121 1550-235X http://hdl.handle.net/11449/224759 10.1103/PhysRevB.73.193407 2-s2.0-33646866606 |
url |
http://dx.doi.org/10.1103/PhysRevB.73.193407 http://hdl.handle.net/11449/224759 |
identifier_str_mv |
Physical Review B - Condensed Matter and Materials Physics, v. 73, n. 19, 2006. 1098-0121 1550-235X 10.1103/PhysRevB.73.193407 2-s2.0-33646866606 |
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 |
|
_version_ |
1803047384776704000 |