Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5423488 | Surface Science | 2010 | 4 Pages |
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.
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Authors
A.W. Signor, Henry H. Wu, Dallas R. Trinkle,