Intraband vs. interband scattering rate effects in neutron irradiated MgB2 (Articolo in rivista)

Type
Label
  • Intraband vs. interband scattering rate effects in neutron irradiated MgB2 (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1209/0295-5075/77/57005 (literal)
Alternative label
  • Putti, M; Brotto, P; Monni, M; d'Agliano, EG; Sanna, A; Massidda, S (2007)
    Intraband vs. interband scattering rate effects in neutron irradiated MgB2
    in Europhysics letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Putti, M; Brotto, P; Monni, M; d'Agliano, EG; Sanna, A; Massidda, S (literal)
Pagina inizio
  • 57005 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 77 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Genoa, CNR INFM LAMIA, I-16146 Genoa, Italy; Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy; Univ Cagliari, CNR INFM SLACS, I-09124 Monserrato, CA, Italy; Univ Cagliari, Dipartimento Fis, I-09124 Monserrato, CA, Italy (literal)
Titolo
  • Intraband vs. interband scattering rate effects in neutron irradiated MgB2 (literal)
Abstract
  • One of the most important predictions of the two-gap theory of superconductivity concerns the role of interband scattering (IBS) by impurities. IBS is expected to decrease the critical temperature, T-c, of MgB2 to a saturation value of about 20 K, where the two gaps merge to a single one. These predictions have been partially contradicted by experiments. In fact, T-c does not saturate in irradiated samples, but decreases linearly with residual resistivity and the merging of the gaps has been observed at a much lower T-c ( 11 K). In this paper we argue that, while at low level of disorder IBS is the leading mechanism that suppresses superconductivity, at higher disorder the experimental results can only be understood if the smearing of the density of states due to intraband electron lifetime effects is considered. Copyright (c) EPLA, 2007. (literal)
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