Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Organic/bio Molecules on Metal Surfaces VI
O 75.11: Vortrag
Donnerstag, 14. März 2013, 18:30–18:45, H38
Simulation of C60 non-equilibrium surface growth — •Nicola Kleppmann1, Sebastian Bommel2,3, Stefan Kowarik3, and Sabine H. L. Klapp1 — 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 2Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany — 3Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
Kinetic Monte Carlo simulation methods allow the simulation of non-equilibrium epitaxial surface growth over experimentally realized time spans of minutes and growth of multiple layers of particles [1]. Through variation of simulated temperature and adsorption rate the structures formed can be manipulated and predictions for experimental methods such as molecular beam epitaxy can be made. We apply the method to simulate multilayer growth of C60. The material parameters are obtained through comparison with Grazing-Incidence X-ray Scattering measurements [2]. The simulations allow for a time-resolved analysis of the real and reciprocal surface, geometric and statistical analysis as well as an understanding of microscopic processes obtained from particle trajectories. Characteristic time-dependent features such as the average island distance and layer filling fraction are consistent with the experimental data for long time spans and several temperatures.
[1] A. Chatterjee and D. G. Vlachos, J. Comp.-Aided Mater. Des. 14, 253-308 (2007)
[2] S. Kowarik, A. Gerlach, S. Sellner, F. Schreiber, L. Cavalcanti and O. Konovalov, Phys. Rev. Lett. 96, 125504 (2006)