2003/04/22 by Andrey V. Chubukov, A. V. Chubukov, Dmitrii L. Maslov +1 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.121102
references added, a typo corrected
arxiv created 2003/04/22 · openalex publication_date 2004/03/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We show that the singularities in the dynamical bosonic response functions of a two-dimensional Fermi liquid give rise to universal nonanalytic corrections to the results of the Fermi-liquid theory. In particular, we find a T2 term in the specific heat, linear-in-T terms in the effective mass and in the uniform spin susceptibility \ensuremathχs(Q=0,T), and |Q| term in \ensuremathχs(Q,T=0). The existence of these terms has been the subject of recent controversy, which is resolved in this paper. We present exact expressions for all nonanalytic terms to second order in a generic interaction U(Q) and show that the nonanalytic terms originate exclusively from forward- and backward-scattering of particles with zero total momentum.