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, Guo-Qing 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

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spin-lattice relaxation
Energy gap
impurities
Spin-lattice relaxation
Fermi level
Superconducting materials
Impurities
Temperature
temperature
zwittergent 3-12

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12 . / Nishiyama, M.; Kato, T.; Sugawara, H.; Kikuchi, D.; Sato, H.; Harima, H.; Zheng, Guo-Qing.

In: Physica B: Condensed Matter, Vol. 378-380, No. SPEC. ISS., 01.05.2006, p. 192-193.

Research output: Contribution to journalArticle

Nishiyama, M, Kato, T, Sugawara, H, Kikuchi, D, Sato, H, Harima, H & Zheng, G-Q 2006, 'Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12 ', Physica B: Condensed Matter, vol. 378-380, no. SPEC. ISS., pp. 192-193. https://doi.org/10.1016/j.physb.2006.01.072
Nishiyama M, Kato T, Sugawara H, Kikuchi D, Sato H, Harima H et al. Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12 Physica B: Condensed Matter. 2006 May 1;378-380(SPEC. ISS.):192-193. https://doi.org/10.1016/j.physb.2006.01.072
Nishiyama, M. ; Kato, T. ; Sugawara, H. ; Kikuchi, D. ; Sato, H. ; Harima, H. ; Zheng, Guo-Qing. / Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12 In: Physica B: Condensed Matter. 2006 ; Vol. 378-380, No. SPEC. ISS. pp. 192-193.
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