High-resolution angle-resolved photoemission study of bulk electronic states in YBa2 Cu3 O7 - δ

K. Nakayama, T. Sato, T. Takahashi, T. Nishizaki, Y. Takahashi, N. Kobayashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have studied low-energy electronic structure of YBa2 Cu3 O7 - δ using high-resolution angle-resolved photoemission spectroscopy (ARPES). By carefully tuning photon energy and polarization of incident light, we identified five different bands in the vicinity of the Fermi level, those are surface-bilayer-derived bonding and antibonding bands, their bulk counterparts, and CuO-chain-derived band, respectively. The surface bands show metallic property reflecting highly overdoped character, while bulk bands show signature of a dx2 - y2-wave superconducting gap opening. The present ARPES result suggests the universality of the bulk electronic states in bilayer high-Tc superconductors.

Original languageEnglish
Pages (from-to)2967-2970
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number12
DOIs
Publication statusPublished - 2008 Dec 1

Keywords

  • C. Photoelectron spectroscopy
  • D. Electronic structure
  • D. Superconductivity

ASJC Scopus subject areas

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

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