Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh1 - x Irx In5

S. Kawasaki, M. Yashima, Y. Mugino, H. Mukuda, Y. Kitaoka, H. Shishido, Y. Onuki

Research output: Contribution to journalArticle

Abstract

We report on chemical-substitution-induced evolution of magnetic correlations and unconventional superconductivity (SC) in CeRh1 - x Irx In5 via the 115In nuclear-quadrupole-resonance (NQR) measurements. It is revealed that the chemical substitution of Rh for Ir enhances markedly antiferromagnetic (AFM) spin fluctuations and superconducting transition temperature Tc. The temperature dependence of nuclear spin-lattice relaxation rate 1 / T1 for x = 0.7 revealing a highest Tc = 1.2 K is interpreted by the anisotropic AFM spin fluctuations model that predicts a relation of T1 T ∝ ( T + θ )3 / 4 with θ ∼ 0. This indicates that the AFM quantum critical spin fluctuations are dominant in the normal state and then enhances Tc through the strong coupling effect of pairing interaction for x = 0.7.

Original languageEnglish
Pages (from-to)400-401
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006
Externally publishedYes

Keywords

  • CeRh Ir In
  • NQR
  • Pressure
  • Spin fluctuations
  • Superconductivity

ASJC Scopus subject areas

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

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