Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combining rare events techniques: phase change in Si nanoparticles   We introduce a combined Restrained MD/Parallel Tempering approach to study
the difference in free energy as a function of a set of collective variables
between two states in presence of unknown slow degrees of freedom.
  We applied this method to study the relative stability of the amorphous vs
crystalline nanoparticles of size ranging between 0.8 and 1.8 nm as a function
of the temperature. We found that, at variance with bulk systems, at low T
small nanoparticles are amorphous and undergo an amorphous-to-crystalline phase
transition at higher T. On the contrary, large nanoparticles recover the
bulk-like behavior: crystalline at low $T$ and amorphous at high T.

3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th