Supporting data and preprint "Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni^2+ ions"

Supporting data and preprint of manuscript "Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni^2+ ions". Dataset including source codes and calculated data. Detailed descriptions of the files can be found in the ReadMe.txt text document.