2000/12/21 by A. Rinaldi, Francesco Sciortino, F. Sciortino +1
Chemical Engineering · Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Spectroscopy and Quantum Chemical Studies #Thermodynamic properties of mixtures #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.1103/physreve.63.061210
arxiv created 2000/12/21 · openalex publication_date 2001/05/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report extensive simulations of liquid supercooled states for a simple three-site molecular model, introduced by Lewis and Wahnström [Phys. Rev. E 50, 3865 (1994)] to mimic the behavior of orthoterphenyl. The large system size and the long simulation length allow us to calculate very precisely (in a large q-vector range) self-correlation and collective correlation functions, providing a clean and simple reference model for theoretical descriptions of molecular liquids in supercooled states. The time and wave-vector dependence of the site-site correlation functions are compared (neglecting the molecular constraints) with detailed ideal mode-coupling theory predictions. Except for the wave-vector region where the dynamics are controlled by the center of mass (around 9 nm(-1)), the theoretical predictions compare very well with the simulation data.