Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 3: Quantenpunkte und -dr
ähte: Herstellung und Charakterisierung

HL 3.2: Vortrag

Montag, 8. März 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.