Diffusion and Stability of Large Clusters on Crystal Surfaces

  • Georg Rosenfeld
  • Karina Morgenstern
  • George Comsa
Part of the NATO ASI Series book series (NSSB, volume 360)


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.


Vacancy Cluster Outer Circle Escape Probability Cluster Decay Cluster Edge 
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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Georg Rosenfeld
    • 1
  • Karina Morgenstern
    • 1
  • George Comsa
    • 1
  1. 1.Institut für Grenzflächenforschung und VakuumphysikForschungszentrum JülichJülichGermany

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