Regensburg 2019 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 32: Complex Fluids and Soft Matter (joint session DY/CPP)

DY 32.10: Talk

Wednesday, April 3, 2019, 17:45–18:00, H3

Kinetic Monte Carlo simulations of thin film growth for pure and mixed films — •Eelco Empting, Miriam Klopotek, and Martin Oettel — Institut für angewandte Physik, Tübingen, Germany

We consider a binary lattice model for growth of demixing thin films, i.e. where two species of particles are deposited onto a substrate and undergo diffusion at and above it. Particle interactions include hard-core repulsion and nearest-neighbor attraction, the strength of which depends on the species of the particles involved. In KMC simulations of this model, we consider quite generally all sorts of single particle moves to neighboring sites, thus allowing for species-dependent diffusion constants, desorption, and formation of cavities.

We studied the influence of the various parameters, most notably diffusion rates and interaction strengths, on the structure and evolution of a growing film. Among other things, this system was used to compare simulations to real-world growth experiments of a C60-CuPC blend film where we can identify the defining parameters leading to characteristic structure in the films.