ANHARMONICITY BUT ABSENCE OF SURFACE MELTING ON AL(001)

Citation
Am. Molenbroek et Jwm. Frenken, ANHARMONICITY BUT ABSENCE OF SURFACE MELTING ON AL(001), Physical review. B, Condensed matter, 50(15), 1994, pp. 11132-11141
Citations number
62
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
50
Issue
15
Year of publication
1994
Pages
11132 - 11141
Database
ISI
SICI code
0163-1829(1994)50:15<11132:ABAOSM>2.0.ZU;2-V
Abstract
Medium-energy ion-scattering measurements and Monte Carlo simulations have been used to study the Al(001) surface as a function of temperatu re. Surface melting does not occur and the surface stays well ordered up to the bulk melting point T-m=933.52 K. The combination of the effe ctive-medium potential, used to simulate the interacting Al atoms, and ion-scattering calculations on the simulated Al(001) surface, reprodu ces the ion-scattering intensities very well. The Monte Carlo simulati ons show that the surface relaxations and the vibration amplitudes bot h display strongly anharmonic behavior which extends several layers in to the crystal and increases with increasing temperature.