Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Screening and gap generation in bilayer graphene   A fully selfconsistent treatment for gap generation and Coulomb screening in
excitonic insulators is presented. The method is based on the equations of
motion for the relevant dynamical variables combined with a variational
approach. Applying the theory for a model system of bilayer graphene, an
excitonic groundstate with a gap exceeding 10 meV is predicted.

10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th