Anomalous Josephson vortex solutions in Josephson junctions with multiple tunneling channels

Ota, Yukihiro; Machida, Masahiko  ; Koyama, Tomio*; Matsumoto, Hideki*

We construct a theory for Josephson junctions with multiple tunneling channels. We focus on two situations, i.e., a heterotic junction composed of two-gap-superconductor, insulator, and one-gap-superconductor, and a grain-boundary junction formed by two identical multi-gap superconductors. Then, we 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. We display such anomalous vortices and suggest how to evaluate the enlargement.