Tc up to 50 K in superlattices of insulating oxides (Articolo in rivista)

Type
Label
  • Tc up to 50 K in superlattices of insulating oxides (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-2048/27/4/044016 (literal)
Alternative label
  • D Di Castro, C Aruta, A Tebano, D Innocenti, M Minola, M Moretti Sala, W Prellier, O Lebedev and G Balestrino (2014)
    Tc up to 50 K in superlattices of insulating oxides
    in Superconductor science and technology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D Di Castro, C Aruta, A Tebano, D Innocenti, M Minola, M Moretti Sala, W Prellier, O Lebedev and G Balestrino (literal)
Pagina inizio
  • 044016 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 27 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-SPIN Tor Vergata, Via del Politecnico 1, I-00133 Roma, Italy Dipartimento di Ingegneria Civile e Ingegneria Informatica, Universit√† di Roma Tor Vergata, Roma Italy CNISM and Dipartimento di Fisica, Politecnico di Milano, I-20133, Italy European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France Laboratoire CRISMAT, UMR 6508, CNRS-ENSICAEN 6 Bd Marechal Juin, F-14050 Caen, France (literal)
Titolo
  • Tc up to 50 K in superlattices of insulating oxides (literal)
Abstract
  • Here we report a structural and electronic investigation of the recently discovered CaCuO2/SrTiO3 superconducting artificial superlattices based on two insulating oxides. We show that Tc D 50 K is reached in the superlattices grown on NdGaO3 substrate under optimized growth conditions. If the superlattices are grown on LaAlO3 substrate the Tc is drastically reduced due to the much higher lattice mismatch between CaCuO2 and LaAlO3, which has lattice parameters substantially smaller than NdGaO3. The consequent inplane lattice contraction also makes the incorporation of extra oxygen atoms more difficult, leading to a decrease of hole doping and Tc. Finally, xray absorption spectroscopy study as a function of the thickness of the CaCuO2 block in CaCuO2/SrTiO3 superconducting superlattices has revealed the important role played by the interfaces as the location of hole doping and superconductivity in these systems. (literal)
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