Universal Thermal and Electrical Transport Near the Superconductor-Metal Quantum Phase Transition in Nanowires
Del Maestro, Adrian
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CitationDel Maestro, Adrian, Bernd Rosenow, Nayana Shah, and Subir Sachdev. 2008. Universal thermal and electrical transport near the superconductor-metal quantum phase transition in nanowires. Physical Review B 77(18): 180501(R).
AbstractWe describe the thermal (\(\kappa\)) and electrical (\(\sigma\)) conductivities of quasi-one-dimensional wires, across a quantum phase transition from a superconductor to a metal induced by pair-breaking perturbations. Fluctuation corrections to BCS theory motivate a field theory for quantum criticality. We describe deviations in the Wiedemann-Franz ratio \(\kappa∕\sigma T\) (where \(T\) is the temperature) from the Lorenz number \((\pi^2∕3)(k_B∕e)^2\), 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.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:7616484
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