Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Field induced tricritical behavior in the S=1/2 quasi one-dimensional
  frustrated Ising antiferromagnet   The results of extensive histogram cluster heat-bath Monte Carlo simulations
on the critical behavior of the quasi-one dimensional Ising antiferromagnet on
a stacked triangular lattice are presented. A small applied field is shown to
induce a crossover from XY universality to mean-field tricritical behavior.
Experimental estimates of critical exponents suggest that these two types of
phase transitions are observed in S=1 CsNiCl$_3$ and $S=1/2$ CsCoBr$_3$,
respectively. The present results demonstrate that this difference can be
explained by an unusual staggered magnetic field arising from quantum exchange
mixing previously proposed to account for spin excitations in $S=1/2$
quasi-one-dimensional Ising antiferromagnets.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th