Tunneling spectroscopy of single crystal BI2SR2CACU2O8

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

Research output: Contribution to journalArticlepeer-review

Abstract

We report an extensive study of conventional tunnel junctions with Pb counterelectrodes on cleaved ab planes of Bi2Sr2CaCu2O8 single crystals with natural barriers. A two-gap structure has been observed for high quality fresh junctions: the inner gap Δ1(T) is BCS-like, the outer gap ΔA0(T) is not BCS-like. The fitted outer gap Δo(0)=26 meV, and 2Δo(0)/kTc-6.7. For older junctions only a smooth conductance with a broadened single gap shows up.

Original languageEnglish (US)
Pages (from-to)1481-1483
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume52
Issue number11-12
DOIs
StatePublished - 1991

Keywords

  • BiSrCaCuO two energy gaps
  • high T
  • tunneling

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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