Albe, Karsten ; Müller, Michael
Hrsg.: Voigt, Axel (2005)
Cluster diffusion and island formation on fcc(111)metal surfaces.
In: Multiscale Modeling in Epitaxial Growth
Buchkapitel, Bibliographie
Kurzbeschreibung (Abstract)
The role of cluster diffusion on Pt and Ir surfaces is discussed in the context of island nucleation on metals. By using molecular dynamics simulations based on a newly developed bond-order potential, the diffusion of Pt2 on a Pt(111) surface is studied. We observe that dimer diffusion proceeds via concerted motion on an hcp-bridge position towards the neighboring fcc-site. The importance of cluster diffusion is then investigated for the case of Ir island nucleation on Ir(111). We study the role of varying deposition rates on the island formation using an extended kinetic lattice Monte Carlo method that takes into account cluster diffusion and includes stacking fault positions. Our results reveal the strong influence of the deposition rate on island densities and shapes.
| Typ des Eintrags: | Buchkapitel |
|---|---|
| Erschienen: | 2005 |
| Herausgeber: | Voigt, Axel |
| Autor(en): | Albe, Karsten ; Müller, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Cluster diffusion and island formation on fcc(111)metal surfaces |
| Sprache: | Englisch |
| Publikationsjahr: | 2005 |
| Ort: | Basel |
| Verlag: | Birkhäuser Verlag |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ISNM International series of numerical mathematics |
| (Heft-)Nummer: | 1 |
| Buchtitel: | Multiscale Modeling in Epitaxial Growth |
| Reihe: | Mini-Workshop at Mathematisches Forschungsinstitut Oberwolfach January 18–24, 2004 |
| Band einer Reihe: | 149 |
| Kurzbeschreibung (Abstract): | The role of cluster diffusion on Pt and Ir surfaces is discussed in the context of island nucleation on metals. By using molecular dynamics simulations based on a newly developed bond-order potential, the diffusion of Pt2 on a Pt(111) surface is studied. We observe that dimer diffusion proceeds via concerted motion on an hcp-bridge position towards the neighboring fcc-site. The importance of cluster diffusion is then investigated for the case of Ir island nucleation on Ir(111). We study the role of varying deposition rates on the island formation using an extended kinetic lattice Monte Carlo method that takes into account cluster diffusion and includes stacking fault positions. Our results reveal the strong influence of the deposition rate on island densities and shapes. |
| Freie Schlagworte: | Kinetic Monte Carlo, Molecular Dynamics, Cluster Diffusion, Island Shapes |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| Hinterlegungsdatum: | 20 Nov 2008 08:25 |
| Letzte Änderung: | 08 Dez 2021 12:01 |
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