Photoemission results of intermetallic superconductors: Nb3Al and MgB2

T. Yokoya, S. Tsuda, A. Chainani, T. Kiss, K. Hirata, Y. Takano, K. Togano, H. Kito, H. Ihara, S. Shin

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

We study the superconducting electronic structures of Nb3Al and MgB2 using high-resolution spectroscopy. The obtained spectrum of Nb3Al measured below Tc shows clear opening of the superconducting gap with a sharp pile up in the density of states and a shift of the leading edge. In addition, the spectrum shows a peak-dip-hump line shape expected from the strong-coupling theory. On the other hand, for MgB2, the superconducting-state spectrum measured at 5.4K shows a coherent peak with a shoulder structure, in sharp contrast to that expected from a single isotropic gap. The superconducting spectral shape of MgB2 can be explained in terms of a multicomponent gap.

Original languageEnglish
Pages (from-to)2141-2144
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume63
Issue number12
DOIs
Publication statusPublished - Dec 2002
Externally publishedYes
EventSNS 2001 - Chicago, IL, United States
Duration: May 13 2001May 17 2002

Keywords

  • A. Intermetallic compounds
  • D. Electronic structure

ASJC Scopus subject areas

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

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