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

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Article number052004
JournalJournal of Physics: Conference Series
Volume807
Issue number5
DOIs
Publication statusPublished - 2017 Apr 6
Event18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, China
Duration: 2016 May 92016 May 13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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