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Observation of a New Fluxon Resonant Mechanism in Annular Josephson Tunnel Structures

C. Nappi·M. P. Lisitskiy·G. Rotoli·R. Cristiano·A. Barone
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Abstract

A novel dynamical state has been observed in the dynamics of a perdurbed sine-Gordon system. This resonant state, has been experimentally observed as a singularity in the dc current voltage characteristic of an annular Josephson tunnel junction, excited in the presence of a magnetic field. With this respect, it can be assimilated to self-resonances known as Fiske steps. Differently from these, however, we demonstrate, on the basis of numerical simulations, that its detailed dynamics involves rotating fluxon pairs, a mechanism associated, so far, to self-resonances known as zero-field steps.

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C. Nappi, M. P. Lisitskiy, G. Rotoli, R. Cristiano, A. Barone. 2004-06-04. Observation of a New Fluxon Resonant Mechanism in Annular Josephson Tunnel Structures. https://doi.org/10.1103/physrevlett.93.187001

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