Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crystal nuclei in melts: A Monte Carlo simulation of a model for
  attractive colloids   As a model for a suspension of hard-sphere like colloidal particles where
small nonadsorbing dissolved polymers create a depletion attraction, we
introduce an effective colloid-colloid potential closely related to the
Asakura-Oosawa model but that does not have any discontinuities. In
simulations, this model straightforwardly allows the calculation of the
pressure from the Virial formula, and the phase transition in the bulk from the
liquid to crystalline solid can be accurately located from a study where a
stable coexistence of a crystalline slab with a surrounding liquid phase
occurs. For this model, crystalline nuclei surrounded by fluid are studied both
by identifying the crystal-fluid interface on the particle level (using
suitable bond orientational order parameters to distinguish the phases) and by
"thermodynamic" means. I.e., the latter method amounts to compute the
enhancement of chemical potential and pressure relative to their coexistence
values. We show that the chemical potential can be obtained from simulating
thick films, where one wall with a rather long range repulsion is present,
since near this wall the Widom particle insertion method works, exploiting the
fact that the chemical potential in the system is homogeneous. Finally, the
surface excess free energy of the nucleus is obtained, for a wide range of
nuclei volumes. From this method, it is established that classical nucleation
theory works, showing that for the present model the anisotropy of the
interface excess free energy of crystals and their resulting nonspherical shape
has only a very small effect on the barrier.

36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn