Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonmagnetic and ferromagnetic fcc cerium studied with one-electron
  methods   Density functional theory was used to study the nonmagnetic (NM) and
ferromagnetic (FM) phases of face-centered cubic cerium. Functionals of four
levels 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 to
study their influence on the results. By supposing that, as a first
approximation, the NM and FM solutions can be identified to the observed
$\alpha$ and $\gamma$ phases, respectively, it is concluded that while a small
value of $U$ or $\alpha_x$ leads to the correct trend for the stability
ordering of the two phases, larger values are necessary for a more appropriate
(but still not satisfying) description of the electronic structure.

24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con