I-V characteristics and optical properties in high-Tc superconductors with alternating junction parameters

Tomio Koyama, Masahiko Machida

Research output: Contribution to journalConference articlepeer-review


We investigate the longitudinal phase dynamics in an intrinsic Josephson-junction array with alternating junction parameters on the basis of the capacitive coupling model. The coupled dynamical equations for the phase differences are derived. The linear dynamics in this system yields two collective phase modes propagating along the c-direction, which are identified with the two longitudinal Josephson-plasma modes observed in the T *-structure high-Tc cuprates. The non-linear phase dynamics in this system shows the existence of stable localized rotating modes, which leads to the multiple branch structure in the I-V characteristics. On the basis of the numerical results we predict the I-V characteristics of the T *-structure high-Tc cuprates.

Original languageEnglish
Pages (from-to)145-148
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue numberPART 1
Publication statusPublished - 2003 Oct 1
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13


  • I-V characteristics
  • Intrinsic Josephson effect
  • T*-structure cuprates

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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