Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density waves and Cooper pairing on the honeycomb lattice   Motivated by the surge in research activities on graphene, we investigate
instabilities of electrons on the honeycomb lattice, interacting by onsite and
nearest-neighbor terms, using a renormalization group scheme. Near half
band-filling, critical minimal interaction strengths are required for
instabilities toward antiferromagnetic or charge-density wave order. Away from
half filling, f-wave triplet pairing and d+id singlet pairing instabilities are
found to emerge out of density-wave regimes.

22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol