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DS: Fachverband Dünne Schichten

DS 43: Thin Film Properties: Structure, Morphology and Composition II

DS 43.6: Vortrag

Donnerstag, 19. März 2020, 18:00–18:15, CHE 89

Transitions between growth modes in lattice KMC simulations — •Eelco Empting, Miriam Klopotek, and Martin Oettel — Insitut für angewandte Physik, University of Tübingen, Germany

We study heteroepitaxial growth on the lattice using Kinetic Monte Carlo (KMC) with nearest-neighbor interactions between particles and contact particle-substrate interactions as well as Ehrlich-Schwöbel (ES) barriers. Two different models are implemented: (i) a solid-on-solid (SOS) model and (ii) a model in which particles are allowed to desorb from the film and diffuse in the gas phase (colloidal growth model, CGM).

Typical experimental growth modes (layer-by-layer, island and 3D growth) are recovered and we identify several dynamical transitions between these.

In the extreme case of an infinite ES barrier, the CGM model results in a behavior which significantly differs from that of the SOS model due to the possible desorption to and resorption from the gas phase.