Vortices in d-wave superconductors

Vortex state solutions are studied in mean field theory for the simplest microscopic model of unconventional superconductivity, the nearest neighbor tight-binding model on a square lattice with on-site and nearest neighbor interactions, which has d- and extended s-wave mean field ground states for suitable values of the parameters. Vortex states of this model are studied by solving the Bogoliubov-de Gennes equations self-consistently in …