Nonanalytic corrections to the specific heat and susceptibility of a two-dimensional Fermi liquid without Galilean invariance

Andrey V. Chubukov, Andrew J. Millis

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4 Scopus citations

Abstract

We consider the leading nonanalytic temperature dependence of the specific heat and temperature and momentum dependence of the spin susceptibility for two-dimensional fermionic systems with noncircular Fermi surfaces. We demonstrate the crucial role played by Fermi surface curvature. For a Fermi surface with inflection points, we demonstrate that thermal corrections to the uniform susceptibility in D=2 change from χs T to χs T2 3 for generic inflection points and to χs T1 2 for special inflection points along symmetry directions. Errors in previous work are corrected. An application of the results to Sr2 Ru O4 is given.

Original languageEnglish (US)
Article number115119
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number11
DOIs
StatePublished - Oct 2 2006

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