Thermodynamics of a Fermi liquid beyond the low-energy limit

Details Thermodynamics of a Fermi liquid beyond the low-energy limit Thermodynamics of a Fermi liquid beyond the low-energy limit

2005-02-23

arxiv.org/abs/cond-mat/0502542v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 eps figure, submitted to PRL

Scientific paper

10.1103/PhysRevLett.95.026402

We consider the non-analytic temperature dependences of the specific heat coefficient, C(T)/T, and spin susceptibility, \chi_{s} (T), of 2D interacting fermions beyond the weak-coupling limit. We demonstrate within the Luttinger-Ward formalism that the leading temperature dependences of C(T)/T and \chi_s (T) are linear in T, and are described by the Fermi liquid theory. We show that these temperature dependences are universally determined by the states near the Fermi level and, for a generic interaction, are expressed via the spin and charge components of the exact backscattering amplitude of quasi-particles. We compare our theory to recent experiments on monolayers of 3He.

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