Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermodynamic and critical properties of an antiferromagnetically
  stacked triangular Ising antiferromagnet in a field   We study a stacked triangular lattice Ising model with both intra- and
inter-plane antiferromagnetic interactions in a field, by Monte Carlo
simulation. We find only one phase transition from a paramagnetic to a
partially disordered phase, which is of second order and 3D XY universality
class. At low temperatures we identify two highly degenerate phases: at smaller
(larger) fields the system shows long-range ordering in the stacking direction
(within planes) but not in the planes (stacking direction). Nevertheless,
crossovers to these phases do not have a character of conventional phase
transitions but rather linear-chain-like excitations.

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The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th