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HL: Fachverband Halbleiterphysik
HL 34: Quantum dots and wires: Theory
HL 34.4: Talk
Tuesday, March 12, 2013, 10:15–10:30, H15
Fast kinetic Monte Carlo simulations of quantum dots — Petar Petrov and •Wolfram Miller — Leibniz-Institut für Kristallzüchtung (IKZ), Max-Born-Str. 2, 12489 Berlin
We present a new three-dimensional heteroepitaxial kinetic Monte Carlo method (KMC) for fast simulation of self-assembled quantom dot arrays. The incorporation of elastic effects due to misfit strained are based on a ball-and-spring model [1]. In contrary to our previous work [2] we simplify the computation of the corrections to the hopping barriers because of the elastic strain in order to accelerate the computation. As an application we studied the system In1−xGaxAs/GaAs and analysed wetting layer formation, uniformity of quantum dots in size, distance, and aspect ratio, and others as a function of deposition rate and substrate temperature.
[1] G. Russo and P. Smereka, J. Comput. Phys. 214 (2006), 809
[2] P. Petrov and W. Miller, Comput. Mater. Sci. 60 (2012), 176