Quasilinear temperature dependence of resistivity due to nested Fermi surface

Abstract

Following an approach by Virosztek and Ruvalds [Phys. Rev. B 42, 4064 (1990)] we calculate the quasiparticle damping close to a quantum critical point (QCP). The model consists of nested Fermi surfaces of an electron pocket and a hole pocket separated by a wave vector Q, which give rise to itinerant antiferromagnetism for a repulsive interaction between the particles. The order can gradually be suppressed by mismatching the nesting and a QCP is obtained as the critical temperature tends to zero. The damping is quasilinear in T yielding a quasilinear T dependence of the resistivity.