Direct evidence for superconducting quasiparticle in triple-layered high-Tc superconductor

T. Takahashi, H. Matsui, T. Sato, S. C. Wang, H. B. Yang, H. Ding, T. Fujii, T. Watanabe, Azusa Matsuda

Research output: Contribution to journalArticle


We have performed angle-resolved photoemission spectroscopy (ARPES) on triple-layered high-Tc cuprate superconductor Bi2Sr2Ca2Cu3O10+δ. We found a direct experimental evidence for Bogoliubov quasiparticle in high-Tc cuprates by observing the full energy dispersion below and above the Fermi level. The excellent quantitative agreement in the dispersion as well as the coherence factors between the ARPES experiment and Bardeen, Cooper and Shrieffer (BCS) theory establishes the validity and universality of the basic framework of BCS theory in high-Tc cuprates.

Original languageEnglish
Pages (from-to)305-306
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Publication statusPublished - 2003 May
Externally publishedYes



  • BCS theory
  • Quasiparticle

ASJC Scopus subject areas

  • Condensed Matter Physics

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