Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.80.014410 http://hdl.handle.net/11449/225590 |
Resumo: | Electron spin resonance (ESR) experiments show, at the metal-semiconductor transition temperature of a conducting polymer, the distinct contributions of the disordered and crystalline regions. In the more disordered regions of the polymer the polarons experience an antiferromagnetic coupling. As the level of disorder decreases, when small crystalline regions appear, there is a tendency, in some temperature range, for the polarons to interact ferromagnetically. For more ordered regions or crystalline regions of larger sizes, there is a competition between localized ferromagnetic coupled polarons and delocalized ones, that is, between localization and delocalization. The possibility to fit the ESR data for one of the samples using two Dysonian lines, one for each phase, allows one to follow the general behavior of the microwave conductivity as a function of the temperature. The semiconducting behavior of the disordered phase is clearly observed, as well as the true metallic behavior of the crystalline phase revealed by the increase in conductivity with the decrease in temperature. © 2009 The American Physical Society. |
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Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymersElectron spin resonance (ESR) experiments show, at the metal-semiconductor transition temperature of a conducting polymer, the distinct contributions of the disordered and crystalline regions. In the more disordered regions of the polymer the polarons experience an antiferromagnetic coupling. As the level of disorder decreases, when small crystalline regions appear, there is a tendency, in some temperature range, for the polarons to interact ferromagnetically. For more ordered regions or crystalline regions of larger sizes, there is a competition between localized ferromagnetic coupled polarons and delocalized ones, that is, between localization and delocalization. The possibility to fit the ESR data for one of the samples using two Dysonian lines, one for each phase, allows one to follow the general behavior of the microwave conductivity as a function of the temperature. The semiconducting behavior of the disordered phase is clearly observed, as well as the true metallic behavior of the crystalline phase revealed by the increase in conductivity with the decrease in temperature. © 2009 The American Physical Society.Departamento de Física Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Caixa Postal 178, CEP 13500-970 Rio Claro, SPInstituto de Física Gleb Wataghin UNICAMP, CEP 13083-970 Campinas, SPDepartamento de Química Universidade Federal de São Carlos, Caixa Postal 676, CEP 13560-970 São Carlos, SPDepartamento de Física Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Caixa Postal 178, CEP 13500-970 Rio Claro, SPUniversidade Estadual Paulista (UNESP)Universidade Estadual de Campinas (UNICAMP)Universidade Federal de São Carlos (UFSCar)Kondo, J. M. [UNESP]Walmsley, L. [UNESP]Rettori, C.Sercheli, M. S.Correa, A. A.Pereira, E. C.2022-04-28T20:55:10Z2022-04-28T20:55:10Z2009-08-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevB.80.014410Physical Review B - Condensed Matter and Materials Physics, v. 80, n. 1, 2009.1098-01211550-235Xhttp://hdl.handle.net/11449/22559010.1103/PhysRevB.80.0144102-s2.0-68949106165Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physicsinfo:eu-repo/semantics/openAccess2022-04-28T20:55:11Zoai:repositorio.unesp.br:11449/225590Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T20:55:11Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
title |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
spellingShingle |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers Kondo, J. M. [UNESP] |
title_short |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
title_full |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
title_fullStr |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
title_full_unstemmed |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
title_sort |
Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers |
author |
Kondo, J. M. [UNESP] |
author_facet |
Kondo, J. M. [UNESP] Walmsley, L. [UNESP] Rettori, C. Sercheli, M. S. Correa, A. A. Pereira, E. C. |
author_role |
author |
author2 |
Walmsley, L. [UNESP] Rettori, C. Sercheli, M. S. Correa, A. A. Pereira, E. C. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Estadual de Campinas (UNICAMP) Universidade Federal de São Carlos (UFSCar) |
dc.contributor.author.fl_str_mv |
Kondo, J. M. [UNESP] Walmsley, L. [UNESP] Rettori, C. Sercheli, M. S. Correa, A. A. Pereira, E. C. |
description |
Electron spin resonance (ESR) experiments show, at the metal-semiconductor transition temperature of a conducting polymer, the distinct contributions of the disordered and crystalline regions. In the more disordered regions of the polymer the polarons experience an antiferromagnetic coupling. As the level of disorder decreases, when small crystalline regions appear, there is a tendency, in some temperature range, for the polarons to interact ferromagnetically. For more ordered regions or crystalline regions of larger sizes, there is a competition between localized ferromagnetic coupled polarons and delocalized ones, that is, between localization and delocalization. The possibility to fit the ESR data for one of the samples using two Dysonian lines, one for each phase, allows one to follow the general behavior of the microwave conductivity as a function of the temperature. The semiconducting behavior of the disordered phase is clearly observed, as well as the true metallic behavior of the crystalline phase revealed by the increase in conductivity with the decrease in temperature. © 2009 The American Physical Society. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-08-06 2022-04-28T20:55:10Z 2022-04-28T20:55:10Z |
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.80.014410 Physical Review B - Condensed Matter and Materials Physics, v. 80, n. 1, 2009. 1098-0121 1550-235X http://hdl.handle.net/11449/225590 10.1103/PhysRevB.80.014410 2-s2.0-68949106165 |
url |
http://dx.doi.org/10.1103/PhysRevB.80.014410 http://hdl.handle.net/11449/225590 |
identifier_str_mv |
Physical Review B - Condensed Matter and Materials Physics, v. 80, n. 1, 2009. 1098-0121 1550-235X 10.1103/PhysRevB.80.014410 2-s2.0-68949106165 |
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_ |
1799964761735036928 |