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 |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Identical superconducting gap on different Fermi surfaces of Ca(Al 0.5Si0.5)2 with the AlB2 structure. / Tsuda, S.; Yokoya, Takayoshi; Shin, S.; Imai, M.; Hase, I.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 69, No. 10, 100506, 03.2004, p. 1005061-1005064.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Identical superconducting gap on different Fermi surfaces of Ca(Al 0.5Si0.5)2 with the AlB2 structure
AU - Tsuda, S.
AU - Yokoya, Takayoshi
AU - Shin, S.
AU - Imai, M.
AU - Hase, I.
PY - 2004/3
Y1 - 2004/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=2142815780&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2142815780&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:2142815780
VL - 69
SP - 1005061
EP - 1005064
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
M1 - 100506
ER -