Phonon spectrum of the ferromagnetic superconductor UGe$_2$ : Consequences for the specific heat

Details Phonon spectrum of the ferromagnetic superconductor UGe$_2$ : Consequences for the specific heat Phonon spectrum of the ferromagnetic superconductor UGe$_2$ : Consequences for the specific heat

2005-09-02

arxiv.org/abs/cond-mat/0509052v2

Corrected version appears in Phys. Rev. B 73 (2006) 094420

Physics

Condensed Matter

Strongly Correlated Electrons

This paper has been withdrawn by the author due to a crucial error in phonon branches assignement

Scientific paper

10.1103/PhysRevB.73.094420

We report inelastic neutron scattering measurements of the phonon spectrum of the pressure-induced ferromagnetic superconductor UGe$_{2}$. No changes of the spectrum were found on cooling down to low temperature. The phonon contribution to the specific heat was estimated from a fit to our data. The excess specific heat previously noted at around $T_{x} \approx$ 30 K is not due to phonons but is well described by the temperature dependence of the magnetic order parameter at the molecular field level.

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