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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52 Scopus citations

Abstract

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
Volume24
Issue number5
DOIs
StatePublished - Feb 8 2012

ASJC Scopus subject areas

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

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    Bauer, E. D., Altarawneh, M. M., Tobash, P. H., Gofryk, K., Ayala-Valenzuela, O. E., Mitchell, J. N., McDonald, R. D., Mielke, C. H., Ronning, F., Griveau, J. C., Colineau, E., Eloirdi, R., Caciuffo, R., Scott, B. L., Janka, O., Kauzlarich, S. M., & Thompson, J. D. (2012). Localized 5f electrons in superconducting PuCoIn 5: Consequences for superconductivity in PuCoGa 5. Journal of Physics Condensed Matter, 24(5), [052206]. https://doi.org/10.1088/0953-8984/24/5/052206