(color online) Spatial distribution of spin density in relaxed (a) Al₃₄Li₂N₃₆, (b) Al₃₄Na2N₃₆, (c) Al₃₄K₂N₃₆, (d) Al₃₄Be₂N₃₆, (e) Al₃₄Mg₂N₃₆, (f) Al₃₄Ca₂N₃₆. Yellow and blue isosurfaces correspond to the majority- and minority-spin densities. Pink and dark blue balls represent Al and N atoms, respectively. Position of the dopant atom is marked as green. The isosurface value of spin charge is 0.0007 e⋅Å⁻³.