COMPETING MECHANISMS IN ADATOM DIFFUSION ON A CHANNELED SURFACE - JUMPS VERSUS METASTABLE WALKS

Authors
MONTALENTI F FERRANDO R
Citation
F. Montalenti et R. Ferrando, COMPETING MECHANISMS IN ADATOM DIFFUSION ON A CHANNELED SURFACE - JUMPS VERSUS METASTABLE WALKS, Physical review. B, Condensed matter, 58(7), 1998, pp. 3617-3620
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
7
Year of publication
1998
Pages
3617 - 3620
Database
ISI
SICI code
0163-1829(1998)58:7<3617:CMIADO>2.0.ZU;2-O
Abstract
It is shown, by molecular-dynamics simulations, that in-channel Au ada tom diffusion on missing-row reconstructed Au(110) takes place by two different mechanisms, jumps and metastable walks. In a metastable walk the adatom climbs up one of the (111) facets of the channel, diffuses fast along the network of metastable minima an that facet, and finall y is trapped again at the channel bottom. A considerable fraction of t he events giving direct mass transport to distant cells occurs by this new mechanism.