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New Experiments for Spontaneous Vortex Formation in Josephson Tunnel Junctions

R. Monaco·M. Aaroe·J. Myging·R. J. Rivers·V. P. Koshelets
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Abstract

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 an improved experiment for measuring the Zurek-Kibble scaling exponent $σ$ for the production of fluxons in annular symmetric Josephson Tunnel Junctions. We find $σ\simeq 0.5$. Further, we report accurate measurements of the junction gap voltage temperature dependence which allow for precise monitoring of the fast temperature variations during the quench.

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R. Monaco, M. Aaroe, J. Myging, R. J. Rivers, V. P. Koshelets. 2006-07-02. New Experiments for Spontaneous Vortex Formation in Josephson Tunnel Junctions. https://doi.org/10.1103/physrevb.74.144513

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