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Tunneling and point contact investigations of La1.85Sr0.15CuO4

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Zeitschrift für Physik B Condensed Matter

Abstract

The high-T c superconductor La1.85Sr0.15CuO4 was investigated by means of point contact and tunneling measurements on small-sized contacts. We find different values for the energy gap at different points of the samples. The ratio 2Δ/k B T c ranges from about 3 to 6. For some point contacts we observe a clear signature of a supercurrent. Data for the temperature dependence of the critical current are presented.

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Authors and Affiliations

  1. Institut für Physik, Johannes-Gutenberg-Universität, Postfach 3980, D-6500, Mainz, Federal Republic of Germany

    P. Leiderer & R. Feile

  2. Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500, Federal Republic of Germany

    B. Renker & D. Ewert

Authors
  1. P. Leiderer
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  2. R. Feile
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  3. B. Renker
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  4. D. Ewert
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Leiderer, P., Feile, R., Renker, B. et al. Tunneling and point contact investigations of La1.85Sr0.15CuO4 . Z. Physik B - Condensed Matter 67, 25–29 (1987). https://doi.org/10.1007/BF01307303

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  • DOI: https://doi.org/10.1007/BF01307303

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