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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleLocal and global superconductivity in bismuthpt_BR
dc.contributor.authorBaring, LApt_BR
dc.contributor.authorda Silva, RRpt_BR
dc.contributor.authorKopelevich, Ypt_BR
unicamp.authorBaring, Luis A. da Silva, Robson R. Kopelevich, Yakov Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Sao Paulo, Brazilpt_BR
dc.description.abstractWe performed magnetization M(H, T) and magnetoresistance R(T, H) measurements on powdered (grain size similar to 149 mu m) as well as highly oriented rhombohedral (A7) bismuth (Bi) samples consisting of single crystalline blocks of size similar to 1 x 1mm in the plane perpendicular to the trigonal c axis. The obtained results revealed the occurrence of (1) local superconductivity in powdered samples with T-c(0) (8.7560.05) K, and (2) global superconductivity at T-c(0) (7.3 +/- 0.1) K in polycrystalline Bi triggered by low-resistance ohmic contacts with silver (Ag) normal metal. The results provide evidence that the superconductivity in Bi is localized in a tiny volume fraction, probably at intergrain or Ag/ Bi interfaces. On the other hand, the occurrence of global superconductivity observed for polycrystalline Bi can be accounted for by enhancement of the superconducting order parameter phase stiffness induced by the normal metal contacts, the scenario proposed in the context of "pseudogap regime" in cuprates [E. Berg et al., Phys. Rev. B 78, 094509 (2008)]. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3671591]pt
dc.relation.ispartofLow Temperature Physicspt_BR
dc.relation.ispartofabbreviationLow Temp. Phys.pt_BR
dc.publisherAmer Inst Physicspt_BR
dc.identifier.citationLow Temperature Physics. Amer Inst Physics, v. 37, n. 41921, n. 889, n. 892, 2011.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorshipINCT NAMITECpt_BR
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.provenanceMade available in DSpace on 2014-07-30T13:38:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2011en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:33:26Z (GMT). No. of bitstreams: 2 WOS000298642000031.pdf: 2774618 bytes, checksum: 9bfde56da8a64b6e91e05db709783b0e (MD5) WOS000298642000031.pdf.txt: 16820 bytes, checksum: ddc3590df752ab66be4a7af73f0b9e38 (MD5) Previous issue date: 2011en
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