New Experiments for Spontaneous Vortex Formation in Josephson Tunnel Junctions

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 $\sigma$ for the production of fluxons in annular symmetric Josephson Tunnel Junctions. We find $\sigma \simeq 0.5$. 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.

12 pages, 5 figures, submitted to Phys. Rev. B

References in corpus (1)

• Estimation of vortex density after superconducting film quench

Cited by in corpus (22)

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