Unconventional superconductivity and antiferromagnetic spin fluctuations in the heavy fermion compound CeCoIn5: 115In-NQR study under pressure

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

Research output: Contribution to journalArticle

Abstract

We report systematic evolution of superconducting (SC) characteristic of heavy-fermion superconductor CeCoIn5 via the nuclear-quadrupole- resonance (NQR) measurement under pressure (P). The temperature dependence of nuclear spin-lattice relaxation rate (1/Tl) below Tc has revealed that once the value of SC energy gap (2Δ0/k BTc) slightly increases in P< 0.45 GPa, with further increasing P, it decreases significantly. By contrast, TC increases monotonously up to 2.6K as P increases up to 1 GPa, exhibiting a saturation in P = 1.0-1.5GPa.

Original languageEnglish
Pages (from-to)e679-e681
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - May 1 2004
Externally publishedYes

Keywords

  • Heavy fermions
  • Nuclear quadrupole resonance
  • Pressure effect
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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