Auteur(s): Appignanesi G.A., Fris J.A.R., Montani R.A., Kob W.
(Article) Publié: Physical Review Letters, vol. 96 p.057801 (2006)
PMID 16486989
DOI: 10.1103/PhysRevLett.96.057801
WoS: 000235252200085
140 Citations
Résumé:
We use molecular dynamics computer simulations to investigate the local motion of the particles in a supercooled binary liquid. Using the concept of the distance matrix, we find that the alpha relaxation corresponds to a small number of crossings from one metabasin to a neighboring one. Each crossing is very rapid and involves the collective motion of O(40) particles that form a relatively compact cluster, whereas stringlike motions seem not to be relevant for these transitions. These compact clusters are thus potential candidates for the cooperatively rearranging regions proposed a long time ago by Adam and Gibbs.
Commentaires: ISI Document Delivery No.: 011FA Times Cited: 0 Cited Reference Count: 26 English Article 0031-9007 057801