Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An investigation of the interrelationship between pressure and
  correlation in LaFeAsO under pressure   Here, we investigated the interrelationship between pressure and correlation
in the LaFeAsO compound by the density functional theory method combined with
the dynamical mean field theory (DFT+DMFT) method. The spectral function and
the occupation number (ON) of Fe-3d orbitals at different pressures were
extracted from the calculations, and the importance of the role of correlation
in superconductivity in iron-based compounds was indicated. The measured ON of
Fe-3d orbitals demonstrated charge transfer between them and also the crucial
role of the Fe-3dxy (xy) orbital in superconductivity in these materials. A
switching behavior between high and low TC through decreasing the correlation
was observed in our calculations, originating from the orbital switching. This
shows the significant role of the orbital degrees of freedom in iron-based
superconductors.

24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol