Universal thermal and electrical transport near the superconductor-metal quantum phase transition in nanowires

Details Universal thermal and electrical transport near the superconductor-metal quantum phase transition in nanowires Universal thermal and electrical transport near the superconductor-metal quantum phase transition in nanowires

2007-08-05

arxiv.org/abs/0708.0687v1

Physical Review B 77, 180501 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.77.180501

We describe the thermal and electrical conductivities of quasi-one dimensional wires, across a quantum phase transition from a superconductor to a metal induced by pairbreaking perturbations. Fluctuation corrections to BCS theory motivate a field theory for quantum criticality. We describe deviations in the Wiedemann-Franz ratio from the Lorenz number, which can act as sensitive tests of the theory. We also describe the crossovers out of the quantum critical region into the metallic and superconducting phases.

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