Fig. 1: Spin-filter Josephson junction and two-dimensional lattice model scheme.
From: Coexistence and tuning of spin-singlet and triplet transport in spin-filter Josephson junctions
Picture of the superconductor/insulating ferromagnet/superconductor two-dimensional lattice model. The barrier (highlighted in blue) has a total thickness L along x. The junction width is W along y. The spin-mixing mechanism due to the spin–orbit coupling is depicted by the spin-flipping process highlighted at the interface between the superconducting boundaries (red sites) and the barrier. The impurities, with random strength depicted by the height of the yellow potential peaks, are represented on each site of the lattice. The exchange field h (violet arrow) is parallel to the z axis, while the hopping t between nearest-neighbor sites is here represented by pink arrows. In the inset, sketch of NbN–GdN–NbN Josephson junctions reported in this work. The external magnetic field H is parallel to the z axis.
