Josephson tunneling in Bi2Sr2CaCu2O8+δ single-crystal break junctions

H. J. Tao, Farun Lu, G. Zhang, E. L. Wolf

Research output: Contribution to journalArticlepeer-review


Josephson tunneling I-V characteristics have been observed in break junctions of oxygen-annealed Bi2Sr2CaCu2O8 (Bi-2212) single crystals, with IcRn≈21.3 mV, and with a sharp quasiparticle edge at 2Δ≈2×20 mV. This demonstrates that low values of the IcRn product, thus far as observed in HTS thin-film junctions, do not represent a fundamental limitation. The sharp quasi-particle current rise at eV=2Δ in these SIS break junctions appears to afford an accurate measurement to be made of a well-defined gap edge.

Original languageEnglish (US)
Pages (from-to)117-120
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number1-2
StatePublished - Apr 20 1994

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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