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Experimental investigation of flux motion in exponentially shaped Josephson junctions

G. Carapella·N. Martucciello·G. Costabile
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Abstract

We report experimental and numerical analysis of expontentially shaped long Josephson junctions with lateral current injection. Quasi-linear flux flow branches are observed in the current-voltage characteristic of the junctions in the absence of magnetic field. A strongly asymmetric response to an applied magnetic field is also exhibited by the junctions. Experimental data are found in agreement with numerical predictions and demonstrate the existence of a geometry-induced potential experienced by the flux quanta in nonuniform width junctions.

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G. Carapella, N. Martucciello, G. Costabile. 2002-03-04. Experimental investigation of flux motion in exponentially shaped Josephson junctions. https://doi.org/10.1103/physrevb.66.134531

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