TY - JOUR
T1 - Identical superconducting gap on different Fermi surfaces of Ca(Al0.5Si0.5)2 with the AlB2 structure
AU - Tsuda, S.
AU - Yokoya, T.
AU - Shin, S.
AU - Imai, M.
AU - Hase, I.
PY - 2004/3/30
Y1 - 2004/3/30
N2 - Angle-resolved photoemission spectroscopy of Ca(Al0.5Si0.5)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 (∼1.2meV±0.2meV). This is in contrast to the case of MgB2, in which different FSs exhibit different gap values. The reduced gap value 2Δ(0)/kBTc of ∼4.2±0.2 classifies CaAlSi as a moderately strong-coupling superconductor.
AB - Angle-resolved photoemission spectroscopy of Ca(Al0.5Si0.5)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 (∼1.2meV±0.2meV). This is in contrast to the case of MgB2, in which different FSs exhibit different gap values. The reduced gap value 2Δ(0)/kBTc 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
U2 - 10.1103/PhysRevB.69.100506
DO - 10.1103/PhysRevB.69.100506
M3 - Article
AN - SCOPUS:2142815780
SN - 1098-0121
VL - 69
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
ER -