Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12

M. Nishiyama, T. Kato, H. Sugawara, D. Kikuchi, H. Sato, H. Harima, G. Q. Zheng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report NQR measurements in the filled-skutterudite compound superconductors Pr ( Os1 - x Rux )4 Sb12 ( x = 0.1, 0.2 ). Upon replacing Os with Ru, the spin-lattice relaxation rate 1 / T1 becomes proportional to temperature (T) at low temperatures far below Tc, and the magnitude of ( 1 / T1 T )low - T increases with increasing Ru content. These results indicate that a finite density of states are induced at the Fermi level by the impurity, suggesting that there exist nodes in the gap function of PrOs4Sb12.

Original languageEnglish
Pages (from-to)192-193
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006

Keywords

  • Impurity effect
  • NQR
  • Pr ( Os Ru ) Sb
  • Superconductivity

ASJC Scopus subject areas

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

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