Momentum dependence of the superconducting Gap in Bi2Sr2CaCu2O8

H. Ding, J. C. Campuzano, A. F. Bellman, T. Yokoya, M. R. Norman, M. Randeria, T. Takahashi, H. Katayama-Yoshida, T. Mochiku, K. Kadowaki, G. Jennings

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


We measure the momentm dependence of the superconducting gap along the Fermi surface of Bi2Sr2CaCu2O8 by high resolution angle-resolved photoemission spectroscopy. The gap is large in the vicinity of the M̄ point (where γ- M̄ is along the Cu-O bond), and small along the γ- X and γ- Y (π,π) directions. However, the gap is not zero along these directions, but, within our accuracy, becomes zero about 10 on either side of the (π,π) directions. We discuss the implications of these results for the symmetry of the order parameter.

Original languageEnglish
Pages (from-to)2784-2787
Number of pages4
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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