Spatially resolved flux flow in long-overlap Josephson tunnel junctions

D. Quenter; A. V. Ustinov; S. G. Lachenmann; T. Doderer; R. P. Huebener; F. Müller; J. Niemeyer; R. Pöpel; T. Weimann

doi:10.1103/PhysRevB.51.6542

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Spatially resolved flux flow in long-overlap Josephson tunnel junctions

D. Quenter, A. V. Ustinov, S. G. Lachenmann, T. Doderer, R. P. Huebener, F. Müller, J. Niemeyer, R. Pöpel, T. Weimann

DOI 10.1103/PhysRevB.51.6542 · Physical Review B

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Abstract

Flux flow in different types of long-overlap Josephson junctions has been investigated by low-temperature scanning electron microscopy. The experimental results are compared with detailed numerical simulations. Describing the dynamics of the Josephson junction with the perturbed sine-Gordon equation, the flux-flow mode represents the case of high fluxon density in the junction. Due to the low damping in the investigated junctions (Nb/AlOx/Nb and Nb/NbOx/Pb based) a complicated interaction of the fluxon chain with reflected waves and cavity mode excitations occurred. The structure of these interactions was imaged with a spatial resolution of about 2 μm and investigated by the numerical simulations.

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
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown