title: Dynamical conductivity at the dirty superconductor-metal quantum phase transition.
abstract: We study the transport properties of ultrathin disordered nanowires in the neighborhood of the superconductor-metal quantum phase transition. To this end we combine numerical calculations with analytical strong-disorder renormalization group results. The quantum critical conductivity at zero temperature diverges logarithmically as a function of frequency. In the metallic phase, it obeys activated scaling associated with an infinite-randomness quantum critical point. We extend the scaling theory to higher dimensions and discuss implications for experiments.
authors.affiliation: Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Adrian
authors.initials: A
authors.lastname: Del Maestro
authors.forename: Bernd
authors.initials: B
authors.lastname: Rosenow
authors.forename: José A
authors.initials: JA
authors.lastname: Hoyos
authors.forename: Thomas
authors.initials: T
authors.lastname: Vojta