Abstract
Angle-resolved photoemission spectroscopy of Ca(Al0.5Si 0.5)2 (CaAlSi), which is a superconductor (transition temperature is 7.7 K) with the AlB2 structure, revealed that superconducting gaps on two Fermi surfaces (FSs) with three-dimensional character around Γ(A) and M(L) in the Brillouin zone provide essentially the same superconducting gap value (∼ 1.2 meV±0.2 meV). This is in contrast to the case of MgB2, in which different FSs exhibit different gap values. The reduced gap value 2Δ(0)/kBT c of ∼4.2±0.2 classifies CaAlSi as a moderately strong-coupling superconductor.
| Original language | English |
|---|---|
| Article number | 100506 |
| Pages (from-to) | 1005061-1005064 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 69 |
| Issue number | 10 |
| Publication status | Published - Mar 2004 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Tsuda, S., Yokoya, T., Shin, S., Imai, M., & Hase, I. (2004). Identical superconducting gap on different Fermi surfaces of Ca(Al 0.5Si0.5)2 with the AlB2 structure. Physical Review B - Condensed Matter and Materials Physics, 69(10), 1005061-1005064. [100506].