Dynamics in a supercooled molecular liquid: Theory and Simulations
Abstract
We report extensive simulations of liquid supercooled states for a simple three-sites molecular model, introduced by Lewis and Wahnstr"om [L. J. Lewis and G. Wahnstr"om, Phys. Rev. E 50, 3865 (1994)] to mimic the behavior of ortho-terphenyl. The large system size and the long simulation length allow to calculate very precisely --- in a large q-vector range --- self and collective correlation functions, providing a clean and simple reference model for theoretical descriptions of molecular liquids in supercooled states. The time and wavevector dependence of the site-site correlation functions are compared with detailed predictions based on ideal mode-coupling theory, neglecting the molecular constraints. Except for the wavevector region where the dynamics is controlled by the center of mass (around 9 nm-1), the theoretical predictions compare very well with the simulation data. ~
Cite
@article{arxiv.cond-mat/0012415,
title = {Dynamics in a supercooled molecular liquid: Theory and Simulations},
author = {A. Rinaldi and F. Sciortino and P. Tartaglia},
journal= {arXiv preprint arXiv:cond-mat/0012415},
year = {2009}
}