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

doi:10.1103/PhysRevB.44.2857

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

Chemistry and Biochemistry

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16 Scopus citations

Abstract

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 language	English
Pages (from-to)	2857-2860
Number of pages	4
Journal	Physical Review B
Volume	44
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.44.2857
State	Published - 1991

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abstract = "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.",

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AU - Cucolo, A. M.

AU - Di Leo, R.

AU - Romano, P.

AU - Schneemeyer, L. F.

AU - Waszczak, J. V.

PY - 1991

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N2 - 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.

AB - 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.

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ER -

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

Abstract

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