Fig. (3) (a) the contour map of total spin density distribution for LaOFeAs crystal. The blue and yellow represents spin up and down respectively, where isosurfaces corresponding to 0.030e/ų; (b) The contour map of electronic density for inner orbitals of As-4s with energy range from -12 to -10 eV. The Blue and red represent α- and β-orbital, corresponding to spin-up and spin-down states, respectively. The isosurfaces corresponds to 0.050e/ų.