Enhanced cluster mobilities on Pt(111) during film growth from the vapor phase
1998 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 72, no 1, 127-129 p.Article in journal (Refereed) Published
We use molecular dynamics simulations to follow the dynamics of small two-dimensional Pt clusters on Pt(111) at 1000 K. While close-packed Pt-7 heptamers are extremely stable structures, the addition of a single cluster vacancy or an on-top adatom immediately results in intracluster bond breaking, reconfigurations, rotations, the introduction of stacking faults, and greatly enhanced cluster diffusion rates. Mapping center-of-mass motion for total simulation times >145 ns revealed increases in cluster velocities by more than an order of magnitude with cluster migration occurring primarily by concerted motion and a novel diffusion mechanism involving double shearing of dimers/trimers. Contrary to some previous reports, edge-atom diffusion plays only a minor role. (C) 1998 American Institute of Physics.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 1998. Vol. 72, no 1, 127-129 p.
IdentifiersURN: urn:nbn:se:liu:diva-105979DOI: 10.1063/1.120664OAI: oai:DiVA.org:liu-105979DiVA: diva2:712790