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 language | English (US) |
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Article number | 052206 |
Journal | Journal of Physics Condensed Matter |
Volume | 24 |
Issue number | 5 |
DOIs | |
State | Published - Feb 8 2012 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Science(all)
- Medicine(all)