Definitive experimental evidence for two-band superconductivity in [formula presented]

S. Tsuda, Takayoshi Yokoya, Y. Takano, H. Kito, A. Matsushita, F. Yin, J. Itoh, H. Harima, S. Shin

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The superconducting-gap of [Formula presented] has been studied by high-resolution angle-resolved photoemission spectroscopy. The results show that superconducting gaps with values of 5.5 and 2.2 meV open on the [Formula presented] band and the [Formula presented] band, respectively, but both the gaps close at the bulk transition temperature, providing a definitive experimental evidence for the two-band superconductivity with strong interband pairing interaction in [Formula presented]. The experiments validate the role of [Formula presented]-dependent electron-phonon coupling as the origin of multiple-gap superconductivity as well as the high transition temperature of [Formula presented].

Original languageEnglish
JournalPhysical Review Letters
Volume91
Issue number12
DOIs
Publication statusPublished - Jan 1 2003
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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