a-b plane tunneling spectroscopy and in-plane gap anisotropy in Bi2Sr2CaCu2O8

J. W. Kane, Q. Chen, K. W. Ng

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The quality of the tunneling spectroscopy of Bi2Sr2CaCu2O8 can be improved significantly by tunneling into the edge of a single crystal, as opposed to directly into a cleaved face. This junction geometry allows tunneling exclusively in the a-b plane, and we will discuss some features that can be reproduced consistently with this technique. This experimental approach also provides us a unique opportunity to observe the gap anisotropy within the a-b plane. We find that the energy gap (Δab) varies from 20 meV to 40 meV, with the maximum value along the orthorhombic crystal axes and the minimum value along the CuO bond direction. No nodal line has been observed, possibly due to the limitation in angular resolution of the tunneling technique.

Original languageEnglish
Pages (from-to)1877-1878
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 3
StatePublished - Dec 1994

Bibliographical note

Funding Information:
*Research supported by NSF grants DMR-9303728 High quality BSCCO 2212 single crystals are provtded by Farun Lu and Professor E L Wolf m Polytechruc Umverslty, New York. We want to thank Prof. C Brock in the ChcmL,,try Department (Umvcrslty of Kentucky) ft, r performing X-ray dtffracllon mea~ureraent-~ for us

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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