Coarsening Dynamics of Crystalline Thin Films

Details Coarsening Dynamics of Crystalline Thin Films Coarsening Dynamics of Crystalline Thin Films

1998-08-12

arxiv.org/abs/cond-mat/9808119v1

Physics

Condensed Matter

Statistical Mechanics

RevTeX, 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.81.5481

The formation of pyramid-like structures in thin-film growth on substrates with a quadratic symmetry, e.g., {001} surfaces, is shown to exhibit anisotropic scaling as there exist two length scales with different time dependences. Analytical and numerical results indicate that for most realizations coarsening of mounds is described by an exponent n=0.2357. However, depending on material parameters, n may lie between 0 (logarithmic coarsening) and 1/3. In contrast, growth on substrates with triangular symmetries ({111} surfaces) is dominated by a single length scale and an exponent n=1/3.

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