Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn5: A study of 115In-NQR under pressure

M. Yashima, S. Kawasaki, Y. Kawasaki, G. Q. Zheng, Y. Kitaoka, H. Shishido, R. Settai, Y. Haga, Y. Onuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report on a systematic evolution of the superconducting (SC) characteristics of CeCoIn5 via nuclear-quadrupole-resonance (NQR) measurement under pressure (P). The application of P significantly suppresses the nuclear spin-lattice relaxation rate 1/T1 that is dominated by antiferromagnetic (AFM) spin fluctuations (SFs). The marked suppression of AFM SFs leads to the reduction in the size of SC energy gap. Nevertheless, Tc increases with the pressure due to the increase in HF bandwidth. This is expected to make the lifetime of quasi-particles sufficiently long.

Original languageEnglish
Pages (from-to)404-406
Number of pages3
JournalPhysica B: Condensed Matter
Volume359-361
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Apr 30 2005
Externally publishedYes

Keywords

  • NQR
  • Pressure effect
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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