Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity in the vicinity of charge ordered state in organic
  conductor beta-(meso-DMBEDT-TTF)_2PF_6   We study theoretically competition between the charge ordering and the
superconductivity in two-dimensional organic conductor
beta-(meso-DMBEDT-TTF)_2PF_6. We analyze the extended Hubbard model on a
weakly-dimerized lattice based on the random phase approximation and Eliashberg
equations. We found reentrant behavior of the checkerbord-type charge-ordered
phase in the phase diagram, and the triplet superconductivity due to the charge
fluctuation in the neighboring region. In the low temperature and high pressure
region, the singlet superconductivity also appears due to the enhancement of
the spin fluctuation.

6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess