Article ID Journal Published Year Pages File Type
5423488 Surface Science 2010 4 Pages PDF
Abstract
Scanning tunneling microscopy combined with molecular dynamics simulations reveals a dislocation-mediated island diffusion mechanism for Cu on Ag(111), a highly mismatched system. Cluster motion is tracked with atomic precision at multiple temperatures and diffusion barriers and prefactors are determined from direct measurements of hop rates. The barrier to nucleate a dislocation is sensitive to island size and shape, resulting in a non-monotonic size dependence of the diffusion barrier.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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