Nonlinear dynamics and collective excitations in layered superconducting structures

Nonlinear excitations in layered superconducting structures formed by a system of long interacting parallel Josephson junctions are investigated theoretically. It is shown that dynamic supersolitons, viz., localized density excitations of a vortex lattice, can propagate in such a system. Effective equations of fluxon lattice dynamics in a magnetic field are used for analyzing two types of soliton excitations: kinks whose propagation involves magnetic flux transfer across superconducting layers, and envelope solitons. The relaxation of dynamic kinks is investigated by using numerical methods.

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