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.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||出版済み - 4 6 2017|
|イベント||18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, 中国|
継続期間: 5 9 2016 → 5 13 2016
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)