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Ostwald ripening of faceted two-dimensional islands | | V. M. Kaganer
; W. Braun
; K. K. Sabelfeld
; | | Date: |
15 Jan 2007 | | Subject: | Other; Statistical Mechanics | | Abstract: | 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 after a very long transient time. The unusual coarsening kinetics obtained in Monte Carlo simulations are well described by the Becker--D"oring equations of nucleation kinetics. These equations can be applied to a wide range of coarsening problems. | | Source: | arXiv, cond-mat/0701338 | | Services: | Forum | Review | PDF | Favorites | |
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