Curie law, entropy excess, and superconductivity in heavy fermion metals and other strongly interacting Fermi liquids

Details Curie law, entropy excess, and superconductivity in heavy fermion metals and other strongly interacting Fermi liquids Curie law, entropy excess, and superconductivity in heavy fermion metals and other strongly interacting Fermi liquids

2005-08-11

arxiv.org/abs/cond-mat/0508275v2

Phys. Rev. Lett. 95, 236402 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures. V.2: a reference added; minor changes as in the published version

Scientific paper

10.1103/PhysRevLett.95.236402

Low-temperature thermodynamic properties of strongly interacting Fermi liquids with fermion condensate are investigated. We demonstrate that the spin susceptibility of these systems exhibits the Curie-Weiss law, and the entropy contains a temperature-independent term. The excessive entropy is released at the superconducting transition, enhancing the specific heat jump Delta C and rendering it proportional to the effective Curie constant. The theoretical results are favorably compared with the experimental data on the heavy fermion metal CeCoIn5, as well as He-3 films.

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