Tunnel junctions using oxide superconducting thin films epitaxially grown on SrTiO3

J. Takada, T. Terashima, Y. Bando, H. Mazaki, K. Iijima, K. Yamamoto, K. Hirata

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Abstract

Normal-metal/insulator/superconductor (NIS) junctions were fabricated using thin films of YBa2Cu3O7-x (YBCO) or ErBa 2Cu3O7-x. These were epitaxially grown on single-crystal SrTiO3 by the activated reactive evaporation method. For some NIS junctions prepared on SrTiO3 (110) substrates, we observed multipeaks in the differential conductance versus voltage curve. NIS junctions using single-crystal YBCO films on SrTiO3 (100) showed a set of peaks, from which we obtained a gap parameter of 11.5±1.5 meV at 4.4 K and a coupling constant of 3.2±0.4.

Original languageEnglish
Pages (from-to)2689-2691
Number of pages3
JournalApplied Physics Letters
Volume53
Issue number26
DOIs
Publication statusPublished - Dec 1 1988

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Takada, J., Terashima, T., Bando, Y., Mazaki, H., Iijima, K., Yamamoto, K., & Hirata, K. (1988). Tunnel junctions using oxide superconducting thin films epitaxially grown on SrTiO3. Applied Physics Letters, 53(26), 2689-2691. https://doi.org/10.1063/1.100546