Dynamical conductivity at the dirty superconductor-metal quantum phase transition

Dynamical conductivity at the dirty superconductor-metal quantum phase transition

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 tempera...

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Veröffentlicht in:Physical review letters 2010-10, Vol.105 (14), p.145702-145702, Article 145702
Hauptverfasser: Del Maestro, Adrian, Rosenow, Bernd, Hoyos, José A, Vojta, Thomas
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container_title Physical review letters
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creator Del Maestro, Adrian
Rosenow, Bernd
Hoyos, José A
Vojta, Thomas
description 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.
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title Dynamical conductivity at the dirty superconductor-metal quantum phase transition
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