Angle-resolved photoemission on untwinned II. Determination of Fermi surfaces

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68 Scopus citations


We present complete Fermi-surface mappings of an untwinned single crystal of (Formula presented) in two distinct photon polarization geometries. Various methods for Fermi-surface determination with angle-resolved photoelectron spectroscopy are discussed and a technique based on the momentum space density of states is developed and applied. The data reveal the presence of two (Formula presented) plane-derived Fermi-surface pockets, along with weak evidence for a single chain sheet, in agreement with earlier work on twinned crystals and ab initio predictions, but show no sign of the expected “stick” pocket centered at (Formula presented). In contrast with earlier work on (Formula presented) we see no evidence for “shadow bands” in optimally doped (Formula presented) supporting the contention that these features arise from structural rather than magnetic correlations.

Original languageEnglish (US)
Pages (from-to)6107-6115
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
StatePublished - 1998
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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