title: Quantum critical behavior near a density-wave instability in an isotropic fermi liquid.
abstract: We study the quantum critical behavior in an isotropic Fermi liquid in the vicinity of a zero-temperature density-wave transition at a finite wave vector qc. We show that, near the transition, the Landau damping of the soft bosonic mode yields a crossover in the fermionic self-energy from Sigma(k,omega) approximately Sigma(k) to Sigma(k,omega) approximately Sigma(omega), where k and omega are momentum and frequency. Because of this self-generated locality, the fermionic effective mass diverges right at the quantum critical point, not before; i.e., the Fermi liquid survives up to the critical point.
authors.affiliation: Department of Physics, University of Wisconsin, Madison, WI 53706, USA.
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Chubukov
authors.forename: Victor M
authors.initials: VM
authors.lastname: Galitski
authors.forename: Victor M
authors.initials: VM
authors.lastname: Yakovenko