Nonlocal electrodynamics of fluxons and nonlinear plasma oscillations in a distributed Josephson junction with electrodes of arbitrary thickness

G. L. Alfimov; A. F. Popkov

doi:10.1103/PhysRevB.73.214512

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Nonlocal electrodynamics of fluxons and nonlinear plasma oscillations in a distributed Josephson junction with electrodes of arbitrary thickness

G. L. Alfimov, A. F. Popkov

DOI 10.1103/PhysRevB.73.214512 · Physical Review B

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Abstract

We considered a distributed Josephson junction formed by superconducting plates of arbitrary thickness in the case of high critical current density when Josephson penetration depth λj is less than London length λL. A nonlocal equation describing electrodynamics of such a junction in nondissipative approximation is derived. The soliton-like excitations of kink type (fluxons) and of breather type are studied. It is shown that the role of nonlocality is crucial for the dynamical properties of these entities: if the nonlocality is strong enough, fluxons can lose their mobility. Interactions between fluxons in the nonlocal model are studied. It is shown that for some interval of fluxon velocities and for some parameters of the junction the interactions are of solitonic type. Also the interaction may result in the emergence of a robust and long-living oscillating state of breather type. These states are studied separately using the approximation of the solution profile by one temporal Fourier harmonic.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	100	Pressure not reported	onset