Charging of superconducting layers and resonance-related hysteresis in the current-voltage characteristics of coupled Josephson junctions

Yu. M. Shukrinov; M. A. Gaafar

doi:10.1103/PhysRevB.84.094514

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Charging of superconducting layers and resonance-related hysteresis in the current-voltage characteristics of coupled Josephson junctions

Yu. M. Shukrinov, M. A. Gaafar

DOI 10.1103/PhysRevB.84.094514 · Physical Review B

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Abstract

A manifestation of a resonance-type hysteresis related to the parametric resonance in the system of coupled Josephson junctions is demonstrated. In contrast with the McCumber and Steward hysteresis, we find that the width of this hysteresis is inversely proportional to the McCumber parameter and it also depends on the coupling between junctions and the boundary conditions. Investigation of the time dependence of the electric charge in superconducting layers allows us to explain the origin of this hysteresis by different charge dynamics for increasing and decreasing bias current processes. The effect of the wavelength of the longitudinal plasma wave created at the resonance on the charging of superconducting layers is demonstrated. We find a strong effect of the dissipation in the system on the amplitude of the charge oscillations at the resonance.