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HL: Halbleiterphysik
HL 3: Quantenpunkte und -dr
ähte: Herstellung und Charakterisierung
HL 3.2: Talk
Monday, March 8, 2004, 10:30–10:45, H17
Threedimensional Kinetic Monte Carlo Simulation of Formation of Microstructures in Liquid Droplets — •Michael Block1, Roland Kunert1, Eckehard Schöll1, Torsten Boeck2, and Thomas Teubner2 — 1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin — 2Institut für Kristallzüchtung Berlin, Max-Born-Str. 2, 12489 Berlin
We simulate the epitaxy of Indium droplets on a glass surface and the crystallization of Silicon inside these droplets utilizing kinetic Monte Carlo methods. The influence of the growth temperature, the flux of incoming particles, the surface coverage, and in particular an energy parameter (comparable to the surface binding energy) upon the morphology of growth is analysed. According to the experimental conditions of crystallization, a temperature gradient and diffusion in spherical droplets is included. The simulations result in the formation of pyramidal structures in agreement with the experiment. The dependence of their shape and the conditions of formation on the growth parameters is investigated in detail.