Character of Atomic Vibrations in a Lennard-Jones Glass
| dc.creator | Allen, Philip B. | |
| dc.creator | Garber, W. | |
| dc.creator | Angelani, L. | |
| dc.date | 2003-07-17 | |
| dc.date | 2003-07-22 | |
| dc.date.accessioned | 2026-07-07T02:52:25Z | |
| dc.date.available | 2026-07-07T02:52:25Z | |
| dc.description | Lennard-Jones glasses (made on a computer by quenching from liquid state coordinates) are studied in harmonic approximation. Vibrational eigenfrequencies and eigenvectors are found by exact diagonalization for models with periodic boundaries and N=(500, 2048, and 6980) atoms. We analyze the density of states, mobility edge, and bond-stretching character of the normal modes. In agreement with older work of Grest, Nagel, and Rahman, the upper 7% of modes are localized, and the rest, delocalized. We find that modes can not be differentiated by any property or quantum number except their eigenfrequency. More specifically, in a given narrow frequency interval, all modes are globally identical. Transverse or longitudinal character, for example, disappears. | |
| dc.description | 4 pages, 4 embedded figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0307435 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0307435 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21835 | |
| dc.subject | Materials Science | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Character of Atomic Vibrations in a Lennard-Jones Glass | |
| dc.type | text |