Ground and Metastable States in $\gamma$-Ce from Correlated Band Theory
  Multiple energy minima of the LDA+U energy functional are obtained for $\gamma$-Ce when it is implemented in a full potential, rotationally invariant scheme including spin-orbit coupling, and different starting local configurations are chosen. The lowest energy solution leads to a fully spin polarized 4f state and the lattice constant of $\gamma$-Ce. The higher energy local minima (additional self-consistent solutions) are shown to be strongly indicative of crystal electric field and multiplet excitations. 
A. B. Shick, W. E. Pickett, A. I. Liechtenstein (Dept. of Physics,   University of California, Davis, CA; Dept. of Physics, ...