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

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

2004-06-04

arxiv.org/abs/cond-mat/0406104v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.93.187001

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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