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

Low-temperature thermodynamic properties of strongly interacting Fermi liquids with a 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 rele...

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Bibliographic Details
Published in:Physical review letters 2005-12, Vol.95 (23), p.236402-236402, Article 236402
Main Authors: Khodel, V A, Zverev, M V, Yakovenko, Victor M
Format: Article
Language:English
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Summary:Low-temperature thermodynamic properties of strongly interacting Fermi liquids with a 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 deltaC 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 3He films.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.236402