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Metal-insulator transitions in pressed pellets of BF4 - doped poly(3-methylthiophene)

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dc.contributor.authorPawlicka, A.
dc.contributor.authorPereira, E. C.
dc.contributor.authorNascimento, O. R.
dc.contributor.authorBulhões, L. O. S.
dc.contributor.authorWalmsley, L. [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:18Z
dc.date.available2014-05-27T11:18:18Z
dc.date.issued1997-12-01
dc.description.abstractFrom Electron Spin Resonance (ESR) data in pressed pellets of BF4 - doped Poly(3-methylthiophene) (P3MT) we obtained simultaneously the paramagnetic susceptibility and. the microwave conductivity. We observed a transition from a high-temperature insulator state to a room-temperature metallic state. Around 240K. evidence of a Peierls transition is observed, but if the sample is slowly cooled, this transition is partially suppressed. DC conductivity data taken with the sample quenched to 79 K show a non-linear I-V response for very small electric fields, suggesting depinning of Charge-Density Wave (CDW). The data for heating and cooling the system above room temperature, indicate the formation of bipolarons.en
dc.description.affiliationDepto. de Físico-Quim. Instituto de Química, C.P. 780
dc.description.affiliationInst. de Fis. e Informática Universidade de São Paulo, C.P. 369, CEP 13560-970, S. Carlos, S.P.
dc.description.affiliationDepartamento de Química Univ. Federal de São Carlos, C.P. 676, CEP 13565-970, S. Carlos, S.P.
dc.description.affiliationDepartamento de Física Inst. de Geociencias e Cie. Exatas Universidade Estadual Paulista, C.P. 178, CEP 13500-970, Rio Clara, S.P.
dc.description.affiliationUnespDepartamento de Física Inst. de Geociencias e Cie. Exatas Universidade Estadual Paulista, C.P. 178, CEP 13500-970, Rio Clara, S.P.
dc.format.extent157-165
dc.identifierhttp://dx.doi.org/10.1080/01411599708220066
dc.identifier.citationPhase Transitions, v. 62, n. 3 SEC. A, p. 157-165, 1997.
dc.identifier.doi10.1080/01411599708220066
dc.identifier.issn0141-1594
dc.identifier.scopus2-s2.0-0031359429
dc.identifier.urihttp://hdl.handle.net/11449/65263
dc.identifier.wosWOS:A1997YH99700002
dc.language.isoeng
dc.relation.ispartofPhase Transitions
dc.relation.ispartofjcr1.028
dc.relation.ispartofsjr0,233
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectCharge-density waves
dc.subjectConducting polymers
dc.subjectElectron spin resonance
dc.subjectMetal-insulator transitions
dc.subjectAromatic compounds
dc.subjectBoron compounds
dc.subjectConductive plastics
dc.subjectElectric conductivity of solids
dc.subjectElectron spin resonance spectroscopy
dc.subjectMicrowave conductivity
dc.subjectParamagnetic susceptibility
dc.subjectPeierls transition
dc.subjectPhase transitions
dc.titleMetal-insulator transitions in pressed pellets of BF4 - doped poly(3-methylthiophene)en
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentFísica - IGCEpt

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Rio Claro - IGCE - Instituto de Geociências e Ciências Exatas