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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