Simultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers

dc.creatorKondo, JM
dc.creatorWalmsley, L
dc.creatorRettori, C
dc.creatorSercheli, MS
dc.creatorCorrea, AA
dc.creatorPereira, EC
dc.date2009
dc.dateJUL
dc.date2014-11-18T15:02:21Z
dc.date2015-11-26T17:51:25Z
dc.date2014-11-18T15:02:21Z
dc.date2015-11-26T17:51:25Z
dc.date.accessioned2018-03-29T00:34:49Z
dc.date.available2018-03-29T00:34:49Z
dc.identifierPhysical Review B. Amer Physical Soc, v. 80, n. 1, 2009.
dc.identifier1098-0121
dc.identifierWOS:000268617100065
dc.identifier10.1103/PhysRevB.80.014410
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74232
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/74232
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74232
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1289974
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionElectron 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.
dc.description80
dc.description1
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherAmer Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.rightshttp://publish.aps.org/authors/transfer-of-copyright-agreement
dc.sourceWeb of Science
dc.subjectantiferromagnetic materials
dc.subjectconducting polymers
dc.subjectelectrical conductivity transitions
dc.subjectferromagnetic materials
dc.subjectparamagnetic resonance
dc.subjectpolarons
dc.subjectSpin-resonance
dc.subjectCarbon Nanotubes
dc.subjectCharge-transport
dc.subjectMolecular-weight
dc.subjectPolyaniline
dc.subjectPolythiophene
dc.subjectPoly(3-methylthiophene)
dc.subjectTemperature
dc.subjectState
dc.titleSimultaneous observation of the magnetic and electric behavior in a correlated system near a metal-semiconductor transition: ESR in pellets of conducting polymers
dc.typeArtículos de revistas


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