Collective modes and Josephson vortices in a heterotic Josephson junction between single- and two-gap superconductors

Yukihiro Ota, Masahiko Machida, Tomio Koyama, Hideki Matsumoto

Research output: Contribution to journalArticlepeer-review

Abstract

We construct a theory of a heterotic Josephson junction between single- and two-gap superconductors. The theory predicts the presence of in-phase and out-of-phase collective modes of superconducting phases. The former is the Josephson plasma mode, and the latter is a counterpart of Leggett's mode in Josephson junctions. A signature for ±s-wave superconductivity is a drastic reduction of the frequency of the Josephson plasma mode. We also show that the magnetic field distribution of the Josephson vortex for ±s-wave superconductivity is more enlarged than that for s-wave without sign change between the order parameters.

Original languageEnglish
Pages (from-to)S882-S883
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Iron-based superconductors
  • Josephson junctions
  • Josephson plasma mode
  • Josephson vortex
  • Josephson-Leggett mode
  • Multi-band superconductors
  • ±s-Wave symmetry

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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