Theory of the pairbreaking superconductor-metal transition in nanowires

Simple item page
dc.creatorDel Maestro, Adrian
dc.creatorRosenow, Bernd
dc.creatorSachdev, Subir
dc.date2008-07-17
dc.date.accessioned2026-07-07T12:47:25Z
dc.date.available2026-07-07T12:47:25Z
dc.descriptionWe present a detailed description of a zero temperature phase transition between superconducting and diffusive metallic states in very thin wires due to a Cooper pair breaking mechanism. The dissipative critical theory contains current reducing fluctuations in the guise of both quantum and thermally activated phase slips. A full cross-over phase diagram is computed via an expansion in the inverse number of complex components of the superconducting order parameter (one in the physical case). The fluctuation corrections to the direct current electrical and thermal conductivities are determined, and we find that the electrical conductivity has a non-monotonic temperature dependence in the metallic phase which may be consistent with recent experimental results on ultra-narrow wires. In the quantum critical regime, the ratio of the thermal to electrical conductivity displays a linear temperature dependence and thus the Wiedemann-Franz law is obeyed, with a new universal experimentally verifiable Lorenz number.
dc.description91 pages, 18 figures, single column format
dc.identifierhttps://arxiv.org/abs/0807.2873
dc.identifierhttp://arxiv.org/abs/0807.2873
dc.identifierAnnals of Physics 324, 523 (2009).
dc.identifierdoi:10.1016/j.aop.2008.08.003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221714
dc.subjectSuperconductivity
dc.titleTheory of the pairbreaking superconductor-metal transition in nanowires
dc.typetext

Files

Collections

arXiv