Metastable $\pi$-junction between an s${}_{\pm }$-wave and an s-wave superconductor

E. Berg, N. H. Lindner, T. Pereg-Barnea

We examine a contact between a superconductor whose order parameter changes sign across the Brillioun zone, and an ordinary, uniform-sign superconductor. Within a Ginzburg-Landau t…