Recent photoemission studies on MgB2 and related materials

Shunsuke Tsuda; Takayoshi Yokoya; Shik Shin

doi:10.1016/j.physc.2006.12.003

Recent photoemission studies on MgB₂ and related materials

Shunsuke Tsuda, Takayoshi Yokoya, Shik Shin

Research output: Contribution to journal › Review article › peer-review

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 language	English
Pages (from-to)	126-133
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	456
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2006.12.003
Publication status	Published - Jun 1 2007

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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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.",

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AU - Shin, Shik

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AB - 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.

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