Observation of gap anisotropy in YBa2Cu3O7−δ by tunneling

J. S. Tsai, I. Takeuchi, J. Fujita, T. Yoshitake, S. Miura, S. Tanaka, T. Terashima, Y. Bando, K. Iijima, K. Yamamoto

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)


Superconductive energy gap of YBa2Cu3O7−δ are measured in anovel broken film edge junction. (001), (103) and (110) oriented films are broken in a cryogenic environment along the appropriate directions together with the SrTiO3 substrate. Pb electrode is brought close in situ to the clean broken film edge. The normalized energy gap 2Δ(0)/kBTc measured in the direction along and perpendicular to the Cu-O plane are found to be 5.9±0.2 and 3.6±0.2 respectively. These values are independent of the variation in the values of Tc within the examined range of 40K∽90K.

Original languageEnglish
Pages (from-to)1385-1386
Number of pages2
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 1988
Externally publishedYes

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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