Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic and magnetic properties of perovskite selenite and tellurite
  compounds: CoSeO$_3$, NiSeO$_3$, CoTeO$_3$ and NiTeO$_3$   Selenium and tellurium are among the few elements that form $AB$O$_3$
perovskite structures with a four valent ion in the $A$ site. This leads to
highly distorted structures and unusual magnetic behavior. Here we investigate
the Co and Ni selenite and tellurite compounds, CoSeO$_3$, CoTeO$_3$, NiSeO$_3$
and NiTeO$_3$ using first principles calculations. We find an interplay of
crystal field and Jahn-Teller distortions that underpin the electronic and
magnetic properties. While all compounds are predicted to show an insulating
G-type antiferromagnetic ground state, there is a considerable difference in
the anisotropy of the exchange interactions between the Ni and Co compounds.
This is related to the Jahn-Teller distortion. Finally, we observe that these
four compounds show characteristics generally associated with Mott insulators,
even when described at the level of standard density functional theory. These
are then dense bulk band or Slater, Mott-type insulators.

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The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph