Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complex Phase Behavior of Repulsive Step Potential Systems in Three
  Dimensions   The comprehensive computer simulation study of the phase diagram of the
repulsive step potential system in three dimensions is represented. We show
that the system with a simple purely repulsive isotropic potential demonstrates
a number of unusual features. The maxima and minima on the melting curve are
found for some regions of potential parameters. It is shown that the phase
diagram in $\rho-T$ plane includes two isostructural crystalline parts
separated by the disordered phase which is amorphous at low enough
temperatures. Phase diagram in the (P-T) plane shows that the transition to the
amorphous state occurs approximately along the extrapolated spinodals.
Structural FCC-BCC phase transition is found at high densities.

19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph