Localized 5f electrons in superconducting PuCoIn 5: Consequences for superconductivity in PuCoGa 5

E. D. Bauer, M. M. Altarawneh, P. H. Tobash, K. Gofryk, O. E. Ayala-Valenzuela, J. N. Mitchell, R. D. McDonald, C. H. Mielke, F. Ronning, J. C. Griveau, E. Colineau, R. Eloirdi, R. Caciuffo, B. L. Scott, O. Janka, S. M. Kauzlarich, J. D. Thompson

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54 Scopus citations


The physical properties of the first In analog of the PuMGa 5 (M=Co, Rh) family of superconductors, PuCoIn 5, are reported. With its unit cell volume being 28% larger than that of PuCoGa 5, the characteristic spin-fluctuation energy scale of PuCoIn 5 is three to four times smaller than that of PuCoGa 5, which suggests that the Pu 5f electrons are in a more localized state relative to PuCoGa 5. This raises the possibility that the high superconducting transition temperature T c=18.5K of PuCoGa 5 stems from the proximity to a valence instability, while the superconductivity at T c=2.5K of PuCoIn 5 is mediated by antiferromagnetic spin fluctuations associated with a quantum critical point.

Original languageEnglish (US)
Article number052206
JournalJournal of Physics Condensed Matter
Issue number5
StatePublished - Feb 8 2012

ASJC Scopus subject areas

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


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