title: Resistivity of a non-galilean-invariant Fermi liquid near Pomeranchuk quantum criticality.
abstract: We analyze the effect of the electron-electron interaction on the resistivity of a metal near a Pomeranchuk quantum phase transition (QPT). We show that umklapp processes are not effective near a QPT, and one must consider both interactions and disorder to obtain a finite and T dependent resistivity. By power counting, the correction to the residual resistivity at low T scales as AT((D+2)/3) near a Z=3 QPT. We show, however, that A=0 for a simply connected, convex Fermi surface in 2D, due to the hidden integrability of the electron motion. We argue that A>0 in a two-band (s-d) model and propose this model as an explanation for the observed T((D+2)/3) behavior.
authors.affiliation: Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611-8440, USA.
authors.forename: Dmitrii L
authors.initials: DL
authors.lastname: Maslov
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Yudson
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Chubukov