Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of Disorder on Charge Orderings and Superconductivity in the
  System of Coexisting Itinerant Electrons and Local Pairs   We study the phase diagrams and thermodynamic properties of a system of
coexisting itinerant electrons and local pairs (LP), in the presence of
diagonal disorder. The model considered takes into account both the charge
exchange couplings, responsible for superconducting orderings, and the
density-density interactions, which can stabilize charge ordered states in the
system. Depending on the strength of the random on-site potential, the
interactions and the particle concentrations the model is found to exhibit
several various phases, including the homogeneous ones: superconducting (SC),
charge density wave (CDW) and nonordered (NO), as well as the phase separated
states (CDW-SC and CDW-NO).

20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat