Superconducting-gap anisotropy:mPhotoemission results on untwinned crystals

Research output: Contribution to journalArticle

56 Scopus citations

Abstract

Polarization-dependent angle-resolved photoemission studies of untwinned single crystals of (Formula presented)(Formula presented)(Formula presented) (Y123) reveal modifications of the near-Fermi-edge spectral weight which are indicative of an anisotropic superconducting gap. The measured magnitude of the leading edge shift increases monotonically from the Γ-S line toward the zone boundary, reaching a maximum value of approximately 25 meV, similar to the behavior seen in (Formula presented)(Formula presented)(Formula presented)(Formula presented) (Bi2212). Within experimental uncertainty, we find variation which is consistent with that expected for a (Formula presented) order parameter, providing additional evidence in support of the d-wave pairing hypothesis.

Original languageEnglish (US)
Pages (from-to)2796-2799
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number5
DOIs
StatePublished - 1997

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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