Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8

T. Ekino, T. Minami, H. Fujii, J. Akimitsu

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.

Original languageEnglish
Pages (from-to)1899-1900
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 3
DOIs
Publication statusPublished - Dec 1994
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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