INVESTIGADORES
FRECHERO marisa Alejandra
artículos
Título:
Ballistic displacements within string-like motions in a supercooled liquid
Autor/es:
APPIGNANESI G. A.; FRECHERO M. A.; ALARCÓN L. M; RODRÍGUEZ FRIS J. A.; MONTANI R. A
Revista:
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
Referencias:
Año: 2004 vol. 339 p. 468 - 481
ISSN:
0378-4371
Resumen:
We perform a series of molecular dynamics simulations in a binary Lennard-Jones system at temperatures close to its mode-coupling temperature, Tc. We demonstrate that the string-like movements carriedout by a fraction of the particles are of ballistic nature. Depending on temperature these ballistic strings are found to become rare events related to free-volume effects on the sample. These facts point to a mechanistic description of the transport process and enables us to provide a microscopic reason for the occurrence of timescale separation.Tc. We demonstrate that the string-like movements carriedout by a fraction of the particles are of ballistic nature. Depending on temperature these ballistic strings are found to become rare events related to free-volume effects on the sample. These facts point to a mechanistic description of the transport process and enables us to provide a microscopic reason for the occurrence of timescale separation.