TY - JOUR
T1 - Superconducting Properties of CeIr3 Single Crystal
AU - Sato, Yoshiki J.
AU - Nakamura, Ai
AU - Shimizu, Yusei
AU - Maurya, Arvind
AU - Homma, Yoshiya
AU - Li, Dexin
AU - Honda, Fuminori
AU - Aoki, Dai
N1 - Funding Information:
Acknowledgments We would like to thank J. P. Brison, J. Flouquet, G. Knebel, and Y. Ōnuki for the useful discussions. This work was supported by KAKENHI (JP16H04006, JP15H05745, JP15H05884, JP15H05882, JP15K21732, JP15H05745, JP15K05156, JP16K17733, and JP17K14328).
Funding Information:
We would like to thank J. P. Brison, J. Flouquet, G. Knebel, and Y. Ōnuki for the useful discussions. This work was supported by KAKENHI (JP16H04006, JP15H05745, JP15H05884, JP15H05882, JP15K21732, JP15H05745, JP15K05156, JP16K17733, and JP17K14328).
Publisher Copyright:
©2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - Superconducting properties of CeIr3 single crystal with rhombohedral structure were examined for the first time using DC magnetization, specific heat, and electrical resistivity measurements. A bulk type-II superconductivity was clearly detected at Tc = 3.4K, which is the second highest Tc among Ce-based intermetallic compounds. The thermodynamic properties as well as an upper critical field Hc2(0) ∼ 46.5kOe for the H ∥ c-axis are fully consistent with the weak-coupling BCS regime. The observed pffiffiffiffi H variation of C(H)=T becomes less pronounced upon cooling, possibly suggesting a suppression of low-energy quasiparticle excitations in an anisotropic s-wave gap in CeIr3, as observed in CeRu2. The origin of superconductivity is discussed from the viewpoints of the valence of Ce atom and Ir 5d-electron with a strong spin–orbit coupling.
AB - Superconducting properties of CeIr3 single crystal with rhombohedral structure were examined for the first time using DC magnetization, specific heat, and electrical resistivity measurements. A bulk type-II superconductivity was clearly detected at Tc = 3.4K, which is the second highest Tc among Ce-based intermetallic compounds. The thermodynamic properties as well as an upper critical field Hc2(0) ∼ 46.5kOe for the H ∥ c-axis are fully consistent with the weak-coupling BCS regime. The observed pffiffiffiffi H variation of C(H)=T becomes less pronounced upon cooling, possibly suggesting a suppression of low-energy quasiparticle excitations in an anisotropic s-wave gap in CeIr3, as observed in CeRu2. The origin of superconductivity is discussed from the viewpoints of the valence of Ce atom and Ir 5d-electron with a strong spin–orbit coupling.
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U2 - 10.7566/JPSJ.87.053704
DO - 10.7566/JPSJ.87.053704
M3 - Article
AN - SCOPUS:85045695858
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
M1 - 053704
ER -