Ga NQR relaxation rates in superconductor PuRhGa5

H. Sakai, S. Kambe, Y. Tokunaga, T. Fujimoto, R. E. Walstedt, H. Yasuoka, D. Aoki, Y. Homma, E. Yamamoto, A. Nakamura, Y. Shiokawa, K. Nakajima, Y. Arai, T. D. Matsuda, Y. Haga, Y. Onuki

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1 Citation (Scopus)

Abstract

Nuclear quadupole resonance (NQR) measurements have been performed on the Pu-based superconductor PuRhGa5 with a transition temperature of ∼ 8.8 K. NQR lines ascribed to 69Ga (2), 71Ga (2), and 69Ga (1) have been found in zero field. Spin-lattice relaxation rate (1 / T1) data for these lines have been measured in the superconducting state. The temperature variation of 1 / T1 can be interpreted in terms of a line-nodal superconducting gap. Data for both the 69Ga (2) and 69Ga (1) NQR lines show a constant-T1 T behavior between Tc and T* ∼ 30 K, which suggests that a coherent Fermi-liquid state sets in below T*. The modified Korringa relation using 1 / T1 and Knight shift data in an applied field indicates that the normal state of PuRhGa5 can be regarded as an antiferromagnetically correlated metal.

Original languageEnglish
Pages (from-to)2103-2106
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume68
Issue number11
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • A. Superconductor
  • D. NQR

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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