Dynamical conductivity at the dirty superconductor-metal quantum phase transition
Disordered Systems and Neural Networks
2010-10-07 v2 Strongly Correlated Electrons
Superconductivity
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.
Cite
@article{arxiv.1006.3793,
title = {Dynamical conductivity at the dirty superconductor-metal quantum phase transition},
author = {Adrian Del Maestro and Bernd Rosenow and J. A. Hoyos and Thomas Vojta},
journal= {arXiv preprint arXiv:1006.3793},
year = {2010}
}
Comments
4 pages, 2 figures; (v2) minor typos corrected, published version