Naslov
Structure and metastability of superheated Al(111)

Autori
Bilalbegović, Goranka

Izvornik
Physical review B : condensed matter (0163-1829) 55 (1997), 24; 16450-16455

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
molecular dynamics simulation; surface stress; super heating; melting

Sažetak
The high-temperature properties of the Al(111) surface are studied by molecular-dynamics simulation. This surface does not melt below the bulk melting point, but can be superheated. Superheating of metal surfaces has been recently observed in several experiments. A molecular-dynamics study of the structural properties reveals how after going through the superheating regime melting occurs over the whole crystal in a narrow temperature range. The temperature dependence of the surface stress, the mean-square vibrational amplitudes and the anomalous outward expansion of the distance between two top layers are calculated. A transition from superheated to liquid state is analyzed using kinetic description for the formation of liquid nuclei by the Fokker-Planck equation and conservation of heat at the liquid-solid interface.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA