115In-NQR study of the novel superconductivity in the heavy-fermion compounds CeIr

✍ Scribed by M. Yashima; S. Taniguchi; N. Tagami; Y. Mugino; H. Mukuda; Y. Kitaoka; Y. Ōta; H. Shishido; R. Settai; Y. Ōnuki

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 312 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.10.059

✦ Synopsis

We present the In-NQR results under pressure ðPÞ in CeIrðIn 1Àx Cd x Þ 5 . In CeCoIn 5 and CeRhIn 5 , the occurrence of superconductivity (SC) is related with the antiferromagnetic spin fluctuations (AFM-SFs) originating from the antiferromagnetic quantum-critical point (AFM-QCP). The high-T c SC ðT cmax > 2 KÞ is realized in both compounds. However, in CeIrIn 5 which is apart from the AFM-QCP, SC occurs even without AFM-SFs and the quite small value of T cmax ($1 K) is observed around P ¼ 3 GPa. The mechanism of SC in CeIrIn 5 may be different from that in CeCoIn 5 and CeRhIn 5 .