Superconducting Properties of CeIr3 Single Crystal

Yoshiki J. Sato; Ai Nakamura; Yusei Shimizu; Arvind Maurya; Yoshiya Homma; Dexin Li; Fuminori Honda; Dai Aoki

doi:10.7566/JPSJ.87.053704

Superconducting Properties of CeIr₃ Single Crystal

Yoshiki J. Sato, Ai Nakamura, Yusei Shimizu, Arvind Maurya, Yoshiya Homma, Dexin Li, Fuminori Honda, Dai Aoki

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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 T_c = 3.4K, which is the second highest T_c among Ce-based intermetallic compounds. The thermodynamic properties as well as an upper critical field H_c2(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.

Original language	English
Article number	053704
Journal	journal of the physical society of japan
Volume	87
Issue number	5
DOIs	https://doi.org/10.7566/JPSJ.87.053704
Publication status	Published - 2018
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.7566/JPSJ.87.053704

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@article{4714b8a2b3d842ab8edb9527055cd4a9,

title = "Superconducting Properties of CeIr3 Single Crystal",

abstract = "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.",

author = "Sato, {Yoshiki J.} and Ai Nakamura and Yusei Shimizu and Arvind Maurya and Yoshiya Homma and Dexin Li and Fuminori Honda and Dai Aoki",

note = "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: {\textcopyright}2018 The Physical Society of Japan.",

year = "2018",

doi = "10.7566/JPSJ.87.053704",

language = "English",

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journal = "Journal of the Physical Society of Japan",

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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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