Bulk-sensitive laser-ARPES study on the cuprate superconductor YBa 2Cu3O7-δ

M. Okawa*, K. Ishizaka, H. Uchiyama, H. Tadatomo, T. Masui, S. Tajima, X. Y. Wang, C. T. Chen, S. Watanabe, A. Chainani, T. Saitoh, S. Shin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We investigate the bulk superconducting electronic structure in optimally doped YBa2Cu3O7-δ (YBCO) using laser-excited angle-resolved photoemission spectroscopy. The band dispersions with the dx2-y2-wave like gap opening are observed without being hindered by surface state and CuO chain band due to bulk-sensitivity and/or matrix element effect at hν=6.994eV. The momentum-dependence of the superconducting gap exhibits a nonzero minimum of ∼12 meV along the (0,0)-(π,π) line. In addition, the unusual suppression of the quasiparticle coherence is observed at T/Tc>0.5-0.7.

Original languageEnglish
Pages (from-to)S62-S64
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec
Externally publishedYes

Keywords

  • ARPES
  • Cuprate superconductor
  • Electronic structure
  • YBCO

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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