Influence of the oxygen content on the tunneling characteristics of YBa2Cu3O7-

A. M. Cucolo, R. Di Leo, P. Romano, L. F. Schneemeyer, J. V. Waszczak

Research output: Contribution to journalArticlepeer-review

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We have formed planar tunnel junctions between Pb films and YBa2Cu3O7- single crystals with different surface oxygen stoichiometries. Oxygen losses have been induced by heating the crystals at 400°C in vacuum for different times. Low-leakage tunnel junctions have also been obtained in the case of the most degraded samples. As the oxygen deficiency increases, the Y-Ba-Cu-O gaplike structure gradually broadens and shifts towards higher energies. For thermally untreated samples, tunneling spectroscopy gives information on the local Tc.

Original languageEnglish
Pages (from-to)2857-2860
Number of pages4
JournalPhysical Review B
Issue number6
StatePublished - 1991


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