2005, Ploog, Klaus H., Braun, Wolfgang, Kaganer, Vladimir M., Jenichen, Bernd, Satapathy, Dillip K.

[no abstract available]

2007, Kaganer, Vladimir, Braun, Wolfgang, Sabelfeld, Karl

We study Ostwald ripening of two-dimensional adatom and advacancy islands on a crystal surface by means of kinetic Monte Carlo simulations. At large bond energies the islands are square-shaped, which qualitatively changes the coarsening kinetics. The Gibbs--Thomson chemical potential is violated: the coarsening proceeds through a sequence of `magic' sizes corresponding to square or rectangular islands. The coarsening becomes attachment-limited, but Wagner's asymptotic law is reached only after a very long transient time. The unusual coarsening kinetics obtained in the Monte Carlo simulations are well described by the Becker--Döring equations of nucleation kinetics. These equations can be applied to a wide range of coarsening problems.

2007, Braun, Wolfgang

[no abstract available]