Experiments on spontaneous vortex formation in Josephson tunnel junctions
R. Monaco, M. Aaroe, J. Mygind, R. J. Rivers, V. P. Koshelets
DOI 10.1103/PhysRevB.74.144513 · Physical Review B
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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 scaling exponent σ for the production of single fluxons in annular symmetric Josephson tunnel junctions. We find σ≃0.5 and show how this can arise from the Kibble-Zurek scenario. Further, we report accurate measurements of the temperature dependence of the junction gap voltage, which allow for precise monitoring of the fast temperature variations during the quench.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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