Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1820145 | Physica C: Superconductivity and its Applications | 2007 | 8 Pages |
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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Shunsuke Tsuda, Takayoshi Yokoya, Shik Shin,