Influence of Coupling between Junctions on Breakpoint Current in Intrinsic Josephson Junctions

Yu. M. Shukrinov; F. Mahfouzi

doi:10.1103/PhysRevLett.98.157001

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Influence of Coupling between Junctions on Breakpoint Current in Intrinsic Josephson Junctions

Yu. M. Shukrinov, F. Mahfouzi

DOI 10.1103/PhysRevLett.98.157001 · Physical Review Letters

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Abstract

We study theoretically the current-voltage characteristics of intrinsic Josephson junctions in high-Tc superconductors. An oscillation of the breakpoint current on the outermost branch as a function of coupling α and dissipation β parameters is found. We explain this oscillation as a result of the creation of longitudinal plasma waves at the breakpoint with different wave numbers. We demonstrate the commensurability effect and predict a group behavior of the current-voltage characteristics for the stacks with a different number of junctions. A method to determine the wave number of longitudinal plasma waves from α and β dependence of the breakpoint current is suggested. We model the α and β dependence of the breakpoint current and obtain good agreement with the results of the simulation.