AVS 46th International Symposium
    Surface Science Division Tuesday Sessions
       Session SS3-TuA

Invited Paper SS3-TuA3
Diffusion and Dynamics of 2D Clusters on Crystal Surfaces

Tuesday, October 26, 1999, 2:40 pm, Room 607

Session: Diffusion on Surfaces
Presenter: L.K. Verheij, IGV, Forschungszentrum Jülich, Germany
Authors: G. Rosenfeld, University of Twente, The Netherlands
L.K. Verheij, IGV, Forschungszentrum Jülich, Germany
D.C. Schloesser, IGV, Forschungszentrum Jülich, Germany
G. Comsa, University of Bonn, Germany
Correspondent: Click to Email
Using fast scanning tunneling microscopy, the diffusion and shape fluctuation of nanoscale vacancy clusters on a Cu(111) surface have been studied. The diffusion constant has been determined as a function of cluster size and temperature, and the underlying atomic scale diffusion processes have been deduced.@footnote 1@ The results are discussed with respect to simple scaling theories. Via detailed analysis of cluster shapes and shape fluctuations both the anisotropy and the absolute value of the line tension, i.e., the specific free energy of cluster edges, have been determined.@footnote 2@ The experimental data yield a comprehensive set of energies believed to be representative for the diffusion and stability of 2D metal clusters on fcc(111) surfaces. @FootnoteText@ @footnote 1@ D.C. Schloesser, L.K. Verheij, G. Rosenfeld, G. Comsa, to be published @footnote 2@ D.C. Schloesser, L.K. Verheij, G. Rosenfeld, G. Comsa, Phys. Rev. Lett. 82, 3843 (1999).