Recent photoemission studies on MgB2 and related materials

Shunsuke Tsuda, Takayoshi Yokoya, Shik Shin

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

MgB2 shows the highest superconducting transition temperature among intermetallic compounds. Angle-resolved photoemission spectroscopy revealed their electronic structure, and the result is well explained within a simple band picture except for one band. Other photoemission studies on related materials of AlB2 and CaAlSi also show an extra band similar to that in MgB2. The direct observation of the superconducting gap confirmed a two-gap superconductivity. The larger and smaller gaps open at the σ and π bands, respectively. The carbon substitution effect on the two gaps was evaluated by using sub-meV photoemission spectroscopy.

Original languageEnglish
Pages (from-to)126-133
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume456
Issue number1-2
DOIs
Publication statusPublished - Jun 1 2007

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Keywords

  • Band structure
  • Photoemission spectroscopy
  • Superconducting gap

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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