Phys. Rev. Lett. 92, 237003 (2004) [4 pages]Universal Conductance of Nanowires near the Superconductor-Metal Quantum TransitionReceived 19 February 2004; published 10 June 2004 We consider wires near a zero temperature transition between superconducting and metallic states. The critical theory obeys hyperscaling, which leads to a universal frequency, temperature, and length dependence of the conductance; quantum and thermal phase slips are contained within this critical theory. Normal, superconducting, and mixed (SN) leads on the wire determine distinct universality classes. For the SN case, wires near the critical point have a universal dc conductance which is independent of the length of the wire at low temperatures. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.237003
DOI:
10.1103/PhysRevLett.92.237003
PACS:
74.81.Fa, 71.10.Hf, 74.78.Na
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