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Density functional theory was used to study the nonmagnetic (NM) andferromagnetic (FM) phases of face-centered cubic cerium. Functionals of fourlevels of approximations for the exchange-correlation energy were used: LDA,PBE, LDA/PBE+$U$, and YS-PBEh. The latter two contain an adjustable parameter,the onsite Coulomb repulsion parameter $U$ for LDA/PBE+$U$ and the fraction$\alpha_x$ of Hartree-Fock exchange for YS-PBEh, which were varied in order tostudy their influence on the results. By supposing that, as a firstapproximation, the NM and FM solutions can be identified to the observed$\alpha$ and $\gamma$ phases, respectively, it is concluded that while a smallvalue of $U$ or $\alpha_x$ leads to the correct trend for the stabilityordering of the two phases, larger values are necessary for a more appropriate(but still not satisfying) description of the electronic structure.

Nonmagnetic and ferromagnetic fcc cerium studied with one-electron methods