Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 2D versus 3D Freezing of a Lennard-Jones Fluid in a Slit Pore: A
  Molecular Dynamics Study   We present a computer simulation study of a (6,12)-Lennard-Jones fluid
confined to a slit pore, formed by two uniform planes. These interact via
(3,9)-Lennard-Jones potential with the fluid particles. When the fluid
approaches the liquid-to-solid transition we first observe layering parallel to
the walls. In order to investigate the nature of the freezing transition we
performed a detailed analysis of the bond-orientational order parameter in the
layers. We found no signs of hexatic order which would indicate a melting
scenario of the Kosterlitz-Thouless type. An analysis of the mean-square
displacement shows that the particles can easily move between the layers,
making the crystallization a 3d-like process. This is consistent with the fact
that we observe a considerable hysteresis in the heating-freezing curves,
showing that the crystallization transition proceeds as an activated process.

9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn