Phys. Rev. B 67, 104506 (2003) [10 pages]Spontaneous fluxon formation in annular Josephson tunnel junctionsReceived 23 July 2002; published 13 March 2003 It has been argued by Zurek and Kibble that the likelihood of producing defects in a continuous phase transition depends in a characteristic way on the quench rate. In this paper we discuss our experiment for measuring the Zurek-Kibble (ZK) scaling exponent σ for the production of fluxons in annular symmetric Josephson tunnel junctions. The predicted exponent is σ=0.25, and we find σ=0.27±0.05. Further, there is agreement with the ZK prediction for the overall normalization. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.104506
DOI:
10.1103/PhysRevB.67.104506
PACS:
67.40.Vs, 11.27.+d, 05.70.Fh, 11.10.Wx
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