Andreev bound states at a cuprate grain boundary junction: A lower bound for the upper critical field

M. Wagenknecht, D. Koelle, R. Kleiner +6

We investigate in-plane quasiparticle tunneling across thin film grain boundary junctions (GBJs) of the electron-doped cuprate La${}_{2-x}$Ce${}_x$CuO${}_4$ in magnetic fields up to $B…