Universal behavior of relaxational heterogeneity in glasses and liquids
| dc.creator | Caprion, D. | |
| dc.creator | Matsui, J. | |
| dc.creator | Schober, H. R. | |
| dc.date | 2000-05-04 | |
| dc.date.accessioned | 2026-07-07T02:37:33Z | |
| dc.date.available | 2026-07-07T02:37:33Z | |
| dc.description | We report an investigation of the heterogeneity in super-cooled liquids and glasses using the non-Gaussianity parameter. We simulate selenium and a binary Lennard-Jones system by molecular dynamics. In the non-Gaussianity three time domains can be distinguished. First there is an increase on the ps-scale due to the vibrational (ballistic) motion of the atoms. This is followed, on an intermediate time-scale, by a growth, due to local relaxations (beta-relaxation) at not too high temperatures. A maximum is reached at times corresponding to long range diffusion (alpha-relaxation). At long times the non-Gaussianity slowly drops, the system becoming homogeneous on these time-scales. In both systems studied, the non-Gaussianity follows in the intermediate time domain, corresponding to the beta-relaxations, a law ~ t^1/2. This general behavior is explained by collective hopping and dynamic heterogeneity. We support this finding by a model calculation. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0005086 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0005086 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/16331 | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.title | Universal behavior of relaxational heterogeneity in glasses and liquids | |
| dc.type | text |