Fluxon dynamics in long annular Josephson tunnel junctions
N. Martucciello, J. Mygind, V. P. Koshelets, A. V. Shchukin, L. V. Filippenko, Roberto Monaco
DOI 10.1103/PhysRevB.57.5444 · Physical Review B
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Abstract
Single-fluxon dynamics has been experimentally investigated in high-quality Nb/Al−AlOx/Nb annular Josephson tunnel junctions having a radius much larger than the Josephson penetration depth. Strong evidence of self-field effects is observed. An external magnetic field in the barrier plane acts on the fluxon as a periodic potential and lowers its average speed. Further, the results of perturbative calculations do not fit the experimental current-voltage profile and, provided the temperature is low enough, this profile systematically shows pronounced deviations from the smooth predicted form. The deviations take the form of fine, hysteretic, almost equally spaced structures.
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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