Zurek-Kibble Mechanism for the Spontaneous Vortex Formation in Josephson Tunnel Junctions: New Theory and Experiment
arXiv:cond-mat/0503707 · doi:10.1103/PhysRevLett.96.180604
Abstract
New scaling behavior has been both predicted and observed in the spontaneous production of fluxons in quenched annular Josephson tunnel junctions as a function of the quench time, . The probability to trap a single defect during the N-S phase transition clearly follows an allometric dependence on with a scaling exponent , as predicted from the Zurek-Kibble mechanism for {\it realistic} JTJs formed by strongly coupled superconductors. This definitive experiment replaces one reported by us earlier, in which an idealised model was used that predicted , commensurate with the then much poorer data. Our experiment remains the only condensed matter experiment to date to have measured a scaling exponent with any reliability.
Four pages, one figure
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