Vortices and Dissipation in a Bilayer Thin Film Superconductor
arXiv:cond-mat/0502402 · doi:10.1103/PhysRevB.71.224514
Abstract
Vortex dynamics in a bilayer thin film superconductor are studied through a Josephson-coupled double layer XY model. A renormalization group analysis shows that there are three possible states associated with the relative phase of the layers: a free vortex phase, a logarithmically confined vortex-antivortex pair phase, and a linearly confined phase. The phases may be distinguished by measuring the resistance to counterflow current. For a geometry in which current is injected and removed from the two layers at the same edge by an ideal (dissipationless) lead, we argue that the three phases yield distinct behaviors: metallic conductivity in the free vortex phase, a power law I-V in the logarithmically confined phase, and true dissipationless superconductivity in the linearly confined phase. Numerical simulations of a resistively shunted Josephson junction model reveal size dependences for the resistance of this system that support these expectations.
arXiv comment17 pages, 2 figures
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Cited by in corpus (6)
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- Giant Phonon Anomaly associated with Superconducting Fluctuations in the Pseudogap Phase of Cuprates
- Finding the elusive sliding phase in superfluid-normal phase transition smeared by c-axis disorder
- An Anomalously Elastic, Intermediate Phase in Randomly Layered Superfluids, Superconductors, and Planar Magnets
- BKT-paired phase in coupled XY models
- Superconductors that do not expel magnetic flux