Inter-grain Josephson currents in two-gap superconductors

Yukihiro Ota, Masahiko Machida, Tomio Koyama

Research output: Contribution to journalArticlepeer-review


We microscopically study inter-grain Josephson currents in iron-pnictide superconductors. The theoretical examination predicts that the inter-grain Josephson current is significantly reduced by ±s-wave symmetry as the incoherent tunneling process becomes dominant and the density of states and the gap amplitude between two bands are identical. In addition, we suggest important points to improve the inter-grain critical current density.

Original languageEnglish
Pages (from-to)S489-S490
JournalPhysica C: Superconductivity and its applications
Issue numberSUPPL.1
Publication statusPublished - 2010 Dec
Externally publishedYes


  • Inter-grain critical current
  • Iron-pnictide superconductors
  • Josephson junctions
  • 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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