| Автор | S Goncalves |
| Автор | J R Iglesias |
| Дата выпуска | 1995-03-20 |
| dc.description | We present molecular dynamics calculations for a two-dimensional binary alloy composed of soft disks. We start the simulation with a system of 108 identical particles at low temperature arranged in a close-packed triangular lattice. Then the diameter ratio lambda is varied in steps while the temperature is kept constant. We define a set of order parameters suitable for detecting the existence of ordered binary domains over a wide range of A-values. The phase diagram thus obtained for the range 0.3<or= lambda <or= lambda 1 shows two ordered phases: one FCC structure below lambda =0.5 and a new structure, not previously reported, for 0.5<or= lambda <or=0.85. This is not expected from Hume-Rothery rules but is in remarkable agreement with experimental results for colloidal systems. Both transitions are first-order ones; we also study hysteresis and metastable states. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A molecular dynamics study of the structural stability of a two-dimensional soft-spheres binary alloy |
| Тип | paper |
| DOI | 10.1088/0953-8984/7/12/004 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 7 |
| Первая страница | 2395 |
| Последняя страница | 2407 |
| Аффилиация | S Goncalves; Inst. de Fisica, Univ. Federal do Rio Grande do Sul, Porto Alegre, Brazil |
| Аффилиация | J R Iglesias; Inst. de Fisica, Univ. Federal do Rio Grande do Sul, Porto Alegre, Brazil |
| Выпуск | 12 |
