I-V characteristics in multi-gap intrinsic Josephson junction stacks

Tomio Koyama, Y. Ota, M. Machida

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We develop a theory for the AC Josephson effect in 2-gap intrinsic Josephson junction stacks. The coupled dynamical equations which the phase differences obey are derived from the phenomenological effective Lagrangian. The equations can describe the longitudinal Josephson plasma and the Leggett mode propagating in the c-direction. Numerical results for the I-V characteristics are presented. The switching current to the voltage state is greatly reduced. The multiple-branch structure appears in the I-V characteristics (74 words)

Original languageEnglish
Pages (from-to)1481-1484
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number20
Publication statusPublished - 2010 Nov 1


  • I-V characteristics
  • Intrinsic Josephson junctions
  • Two-gap superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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