Low temperature specific heat of the heavy fermion superconductor PrOs$_4$Sb$_{12}$

Details Low temperature specific heat of the heavy fermion superconductor PrOs$_4$Sb$_{12}$ Low temperature specific heat of the heavy fermion superconductor PrOs$_4$Sb$_{12}$

2002-07-09

arxiv.org/abs/cond-mat/0207225v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.90.057001

We report the magnetic field dependence of the low temperature specific heat of single crystals of the first Pr-based heavy fermion superconductor PrOs$_4$Sb$_{12}$. The low temperature specific heat and the magnetic phase diagram inferred from specific heat, resistivity and magnetisation provide compelling evidence of a doublet ground state and hence superconductivity mediated by quadrupolar fluctuations. This establishes PrOs$_4$Sb$_{12}$ as a very strong contender of superconductive pairing that is neither electron-phonon nor magnetically mediated.

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