Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nature of insulating state in NaV$_{2}$O$_{5}$ above charge-ordering
  transition: a cluster DMFT study   The nature of insulating state driven by electronic correlations in the
quarter-filled ladder compound $\alpha'$NaV$_{2}$O$_{5}$ is investigated within
a cluster dynamical mean-field approach. An extended Hubbard model with
first-principle tight-binding parameters have been used. It is shown that the
insulating state in the charge-disordered phase of this compound is formed due
to the transfer of spectral density and dynamical charge fluctuations where for
the latter, the role of inter-site Coulomb interaction is found to be of
crucial importance.

22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org