Metal-insulator transition Semiconductor insulator boundaries 4 Ab initio method 2 Barium 2 Calcium 2 Density functional theory 2 Density of state 2 Double perovskites 2 Eigenstates 2 Electron mobility 2 Electronic and magnetic properties 2 Electronic properties 2 Energy eigenstates 2 Finite size 2 Impurity band 2 Impurity bands 2 Insulation 2 Magnetic and electronic properties 2 Magnetic properties 2 Metal insulator boundaries 2 Metal insulator transition 2 Metallic behaviors 2 N-doped semiconductor 2 Participation ratios 2 Perovskite 2 Perturbed state 2 Semiconductor doping 2 Semiconductor materials 2 Semiconductors 2 Spin orbit interactions 2