EFFECT OF GRAIN BOUNDARY NETWORK ON PATTERN FORMATION IN a-Ge/Au BILAYER FILMS

The a-Ge/p-Au bilayer thin films with different Au grain sizes were prepared. After annealing, different patterns of Ge appeared in the film morphology. It is found that the fractal dimensions of the patterns are highly dependent on the grain size of Au, and the experimental results indicate that the fractal formation in such system is truly dominated by the local latent temperature field.