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Enhanced cluster mobilities on Pt(111) during film growth from the vapor phase
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
University of Illinois, Urbana, USA.
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
Abstract [en]

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.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-105979DOI: 10.1063/1.120664OAI: oai:DiVA.org:liu-105979DiVA: diva2:712790
Available from: 2014-04-16 Created: 2014-04-15 Last updated: 2017-12-05Bibliographically approved

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Chirita, ValeriuMünger, PeterGreene, Joseph E

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