Experimental investigation of flux motion in exponentially shaped Josephson junctions
arXiv:cond-mat/0203055 · doi:10.1103/PhysRevB.66.134531
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.
16 pg, 8 figures, Submitted in PRB March 4
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