Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiferroic behavior in trimerized Mott insulators   We demonstrate multiferroic behavior in trimerized Mott insulators through
interplay between spins and electric dipole moments resulting from electronic
charge fluctuations in frustrated units. The model consists of stacked
triangular layers of trimers with small intertrimer exchange interactions $J'$
and $J"$. Ferroelectric states coexist with ferro- or antiferromagnetic
orderings depending on the value of the magnetic field $H$ and the sign of the
interlayer exchange $J"$. The electric polarization undergoes abrupt changes as
a function of $H$.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn