Thickness induced superconducting insulating transition in Nd1.2Ba1.8Cu3Oz ultra-thin films (Articolo in rivista)

Type
Label
  • Thickness induced superconducting insulating transition in Nd1.2Ba1.8Cu3Oz ultra-thin films (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1109/TASC.2007.898896 (literal)
Alternative label
  • Salluzzo M.; De Luca G.M.; Vaglio R. (2007)
    Thickness induced superconducting insulating transition in Nd1.2Ba1.8Cu3Oz ultra-thin films
    in IEEE transactions on applied superconductivity (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Salluzzo M.; De Luca G.M.; Vaglio R. (literal)
Pagina inizio
  • 3569 (literal)
Pagina fine
  • 3572 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Conference: Applied Superconductivity Conference 2006 Location: Seattle, WA Date: AUG 27-SEP 01, 2006. Selected and revised paper. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 17 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR INFM COHERENTIA, I-80126 Naples, Italy (literal)
Titolo
  • Thickness induced superconducting insulating transition in Nd1.2Ba1.8Cu3Oz ultra-thin films (literal)
Abstract
  • A study of the thickness induced superconducting to insulator transition in Nd1.2Ba1.8Cu3Oz, (NdBCO) epitaxial films is presented. The samples have been deposited by high oxygen pressure diode sputtering on SrTiO3(100) substrates. Accurate structural characterizations have been carried out in function of the film thickness by x-ray diffraction using conventional and synchrotron radiation sources. The superconductor to insulator transition is correlated to a structural transformation from a pseudotetragonal phase, characterized by the presence of short Cu(1)O chains in both a and b directions, to a tetragonal structure where Cu(1)O chains are completely destroyed. We demonstrate that the ordering of oxygen ions is essential for the appearance of the superconductivity, while oxygen disorder in the Cu(1)O planes, leads to a two-dimensional MOTT insulating behavior of the resistivity associated to a localization of the carriers within lengths lower than 3 nm. (literal)
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