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O: Fachverband Oberflächenphysik
O 14: Metal Substrates: Epitaxy and Growth
O 14.5: Vortrag
Montag, 26. März 2007, 15:15–15:30, H39
Growth of Co nanoislands on Cu(111): theoretical and experimental study — •Nikolay Negulyaev1, Valeriy Stepanyuk2, Patrick Bruno2, Lars Diekhöner3, Peter Wahl4, and Klaus Kern4 — 1Fachbereich Physik, Martin-Luther-Universität, Halle (Saale), Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany — 3Institut for Fysik og Nanoteknologi, Aalborg Universitet, Denmark — 4Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
We report on the theoretical and experimental study of the growth of Co nanoislands on Cu(111) at 80-300 K. The detailed molecular dynamics and kinetic Monte Carlo simulations are performed. Atomistic processes at edges, kinks, corners of islands and interlayer mass transport are studied. We reveal the effect of the strain in the substrate and nanoislands on the growth process. The temperature dependence of shape and structure of nanoislands is investigated. We report on the blocking effect: novel kinetic mechanism related to the interlayer mass transport and responsible for the growth of Co nanoislands of two monolayers height at room temperature. Results of the theoretical studies are compared with STM observations.