Diffusion and Stability of Large Clusters on Crystal Surfaces

Georg Rosenfeld, Karina Morgenstern, George Comsa

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review


Diffusion and stability of large two-dimensional clusters (consisting of hundreds to thousands of atoms) are discussed. Scaling laws for the diffusion constant and the decay time of clusters as a function of the cluster size are derived from a microscopic point of view by treating atom diffusion near the cluster edge as a random walk problem of a single particle in the vicinity of an adsorbing boundary. This treatment establishes the connection between the quantities which can be determined by experiment (i.e., the cluster diffusion constant and the decay rate) to the microscopic diffusion processes of single atoms. The results are illustrated by experimental examples for diffusion and decay of adatom and vacancy clusters on a Ag(111) surface.
Original languageEnglish
Title of host publicationSurface Diffusion
Subtitle of host publicationAtomistic and Collective Processes
EditorsM.C. Tringides
Place of PublicationNew York
Number of pages14
ISBN (Electronic)978-1-4899-0262-7
ISBN (Print)978-0-306-45613-8, 978-1-4899-0264-1
Publication statusPublished - 1997
Externally publishedYes

Publication series

NameNATO ASI Series
ISSN (Print)0258-1221


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