Enhancement of Tc in CeIr(In1-xCdx)5 studied by In-NQR

Mitsuharu Yashima; Kyohei Tani; Kazuhiro Nishimoto; Hidekazu Mukuda; Yoshio Kitaoka; Fuminori Honda; Rikio Settai; Yoshichika O'Nuki

doi:10.1088/1742-6596/807/5/052004

Enhancement of T_c in CeIr(In_1-xCd_x)₅ studied by In-NQR

Mitsuharu Yashima, Kyohei Tani, Kazuhiro Nishimoto, Hidekazu Mukuda, Yoshio Kitaoka, Fuminori Honda, Rikio Settai, Yoshichika O'Nuki

Materials Processing and Characterization Division

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report on superconducting nature under pressure in CeIr(In_1-xCd_x)₅ by In-Nuclear-Quadrupole-Resonance (NQR) studies. In CeIr(In_0.925Cd_0.075)₅, the inhomogeneous antiferromagnetic order at T_N ∼ 2.3 K is induced by Cd-dopants and superconductivity disappears at ambient pressure. However, the measurements of a nuclear-spin-lattice-relaxation rate 1/T₁ have revealed that the superconductivity suddenly occurs above 2.1 GPa. It is observed that the superconducting gap is enhanced in the Cd-doped sample, indicating that the Cd-doping induces the strong coupling superconductivity leading to the enhancement of T_c in the CeIrIn₅ system. Furthermore, we found that the residual density of states at the Fermi level increases with increasing pressure, suggesting that the superconducting nature of CeIrIn₅ is quite different from those of CeCoIn₅ and CeRhIn₅.

Original language	English
Article number	052004
Journal	Journal of Physics: Conference Series
Volume	807
Issue number	5
DOIs	https://doi.org/10.1088/1742-6596/807/5/052004
Publication status	Published - 2017 Apr 6
Event	18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, China Duration: 2016 May 9 → 2016 May 13

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Enhancement of Tc in CeIr(In1-xCdx)5 studied by In-NQR",

abstract = "We report on superconducting nature under pressure in CeIr(In1-xCdx)5 by In-Nuclear-Quadrupole-Resonance (NQR) studies. In CeIr(In0.925Cd0.075)5, the inhomogeneous antiferromagnetic order at TN ∼ 2.3 K is induced by Cd-dopants and superconductivity disappears at ambient pressure. However, the measurements of a nuclear-spin-lattice-relaxation rate 1/T1 have revealed that the superconductivity suddenly occurs above 2.1 GPa. It is observed that the superconducting gap is enhanced in the Cd-doped sample, indicating that the Cd-doping induces the strong coupling superconductivity leading to the enhancement of Tc in the CeIrIn5 system. Furthermore, we found that the residual density of states at the Fermi level increases with increasing pressure, suggesting that the superconducting nature of CeIrIn5 is quite different from those of CeCoIn5 and CeRhIn5.",

author = "Mitsuharu Yashima and Kyohei Tani and Kazuhiro Nishimoto and Hidekazu Mukuda and Yoshio Kitaoka and Fuminori Honda and Rikio Settai and Yoshichika O'Nuki",

year = "2017",

month = apr,

day = "6",

doi = "10.1088/1742-6596/807/5/052004",

language = "English",

volume = "807",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "5",

note = "18th International Conference on Strongly Correlated Electron Systems, SCES 2016 ; Conference date: 09-05-2016 Through 13-05-2016",

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TY - JOUR

T1 - Enhancement of Tc in CeIr(In1-xCdx)5 studied by In-NQR

AU - Yashima, Mitsuharu

AU - Tani, Kyohei

AU - Nishimoto, Kazuhiro

AU - Mukuda, Hidekazu

AU - Kitaoka, Yoshio

AU - Honda, Fuminori

AU - Settai, Rikio

AU - O'Nuki, Yoshichika

PY - 2017/4/6

Y1 - 2017/4/6

N2 - We report on superconducting nature under pressure in CeIr(In1-xCdx)5 by In-Nuclear-Quadrupole-Resonance (NQR) studies. In CeIr(In0.925Cd0.075)5, the inhomogeneous antiferromagnetic order at TN ∼ 2.3 K is induced by Cd-dopants and superconductivity disappears at ambient pressure. However, the measurements of a nuclear-spin-lattice-relaxation rate 1/T1 have revealed that the superconductivity suddenly occurs above 2.1 GPa. It is observed that the superconducting gap is enhanced in the Cd-doped sample, indicating that the Cd-doping induces the strong coupling superconductivity leading to the enhancement of Tc in the CeIrIn5 system. Furthermore, we found that the residual density of states at the Fermi level increases with increasing pressure, suggesting that the superconducting nature of CeIrIn5 is quite different from those of CeCoIn5 and CeRhIn5.

AB - We report on superconducting nature under pressure in CeIr(In1-xCdx)5 by In-Nuclear-Quadrupole-Resonance (NQR) studies. In CeIr(In0.925Cd0.075)5, the inhomogeneous antiferromagnetic order at TN ∼ 2.3 K is induced by Cd-dopants and superconductivity disappears at ambient pressure. However, the measurements of a nuclear-spin-lattice-relaxation rate 1/T1 have revealed that the superconductivity suddenly occurs above 2.1 GPa. It is observed that the superconducting gap is enhanced in the Cd-doped sample, indicating that the Cd-doping induces the strong coupling superconductivity leading to the enhancement of Tc in the CeIrIn5 system. Furthermore, we found that the residual density of states at the Fermi level increases with increasing pressure, suggesting that the superconducting nature of CeIrIn5 is quite different from those of CeCoIn5 and CeRhIn5.

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DO - 10.1088/1742-6596/807/5/052004

M3 - Conference article

AN - SCOPUS:85018341691

VL - 807

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 5

M1 - 052004

T2 - 18th International Conference on Strongly Correlated Electron Systems, SCES 2016

Y2 - 9 May 2016 through 13 May 2016

ER -

Enhancement of T_c in CeIr(In_1-xCd_x)₅ studied by In-NQR

Abstract

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