Kinetic Monte Carlo simulation of growth of Ge quantum dot multilayers with amorphous matrix

Abstract

Kinetic Monte Carlo method is used to simulate the growth of germanium quantum dot multilayers with amorphous matrix. We modified a model for self-assembled growth of quantum dots in crystalline matrix for the case of the amorphous one.

The surface morphology given as hills above the buried dots is the main driving force for the ordering of the quantum dots. In the simulations, we observed a short-range self-ordering in the lateral direction.

The ordering in lateral and vertical direction depends strongly on the surface morphology, mostly on the strength how the deposited material replicates previous surfaces.

Keywords

• Quantum dot
• Multilayer
• Amorphous
• Kinetic Monte Carlo
• Modeling and simulations