Investigation of the breakpoint region in stacks with a finite number of intrinsic Josephson junctions

Yu M. Shukrinov, F. Mahfouzi, Niels Falsig Pedersen

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    Abstract

    We study the breakpoint region on the outermost branch of current-voltage characteristics of the stacks with di_erent number of intrinsic Josephson junctions. E_ect of the boundary conditions on the breakpoint region is demonstrated. At periodic boundary conditions the breakpoint region is absent for stacks with even number of junctions. For stacks with odd number of junctions and for stacks with nonperiodic boundary conditions the breakpoint current is increased with number of junctions and saturated at the value corresponding to the periodic boundary conditions. The region of saturation and the saturated value depend on the coupling between junctions. We explain the results by the parametric resonance at the breakpoint and excitation of the longitudinal plasma wave by the Josephson oscillations. A way for the diagnostics of the junctions in the stack is proposed.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume75
    Issue number10
    Pages (from-to)104508
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • CURRENT-VOLTAGE CHARACTERISTICS
    • SINGLE-CRYSTALS
    • T-C SUPERCONDUCTORS
    • COLLECTIVE DYNAMICS
    • I-V CHARACTERISTICS
    • BI2SR2CACU2O8+DELTA

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