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Study of the yttrium and zinc substitutions effects in Bi2Sr2CaCu2O8+δ compounds by transport measurements

hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
dc.contributor.authorPIGNON, Bruno
hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
dc.contributor.authorAUTRET-LAMBERT, Cécile
hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
dc.contributor.authorRUYTER, Antoine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDECOURT, Rodolphe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
dc.contributor.authorMONOT-LAFFEZ, I.
hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
dc.contributor.authorAMMOR, Larbi
dc.date.issued2008
dc.identifier.issn0921-4534
dc.description.abstractEnThe effects of yttrium Y and zinc Zn substitution on calcium Ca and cupper Cu sites in Bi2Sr2CaCu2O8+δ compounds have been investigated by resistivity measurements. At high temperature, after a superconducting transition, the electrical behaviour evolves from a metallic state in compounds with a weak Y concentration into a semi-conducting state (hopping conduction) in compounds with a large Y concentration. Similarly, the Zn substitution modifies the electrical behaviour from metallic to insulating with a much lower concentration comparatively to Y. In the two cases, the semi-conducting behaviour is described by hopping between localised states in the conduction band. This localization is explained by the random distribution of the doping elements which originates from the Y/Zn and Cu wave-functions overlap. The obtained results show the localization is improved in the case of Zn. Consequently, it is suggested that the direct substitution of Zn into the planes leads to a greater overlap. Moreover, the superconducting transition (critical temperature: TC) shows an irregular depression when Zn is substituted. According to an X-Ray diffraction study, this result can be interpreted by internal micro-strains in the structure.
dc.language.isoen
dc.publisherElsevier
dc.subject.enBi-2212
dc.subject.enY and Zn codoping
dc.subject.enTransport properties
dc.subject.enInhomogeneity
dc.subject.enLocalization
dc.title.enStudy of the yttrium and zinc substitutions effects in Bi2Sr2CaCu2O8+δ compounds by transport measurements
dc.typeArticle de revue
dc.identifier.doi10.1016/j.physc.2007.09.014
dc.subject.halChimie/Matériaux
bordeaux.journalPhysica C: Superconductivity and its Applications
bordeaux.page865-871
bordeaux.volume468
bordeaux.issue11-12
bordeaux.peerReviewedoui
hal.identifierhal-00300701
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00300701v1
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