Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jahn-Teller Effect and Superexchange in Half-Doped Manganites   We investigate the stability of the charge exchange (CE) phase within a
microscopic model which describes a single plane as in
La$_{0.5}$Sr$_{1.5}$MnO$_4$. The model includes Coulomb interactions (on-site
and intersite), the Jahn-Teller term and the superexchange interactions due to
$e_g$ and $t_{2g}$ electrons. By investigating the phase diagram at T=0 in
mean-field approximation we conclude that the superexchange interactions can
stabilize the CE phase, but only if they are stronger than estimated from
spectroscopy.

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The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio