Phys. Rev. Lett. 82, 2737–2740 (1999)Dynamics, Interactions, and Collisions of Atomic Steps on Si(111) in Sublimation
See accompanying Physics Focus The dynamics of atomic steps and the interactions between them were observed by in situ scanning electron microscopy for the sublimation of a Si(111) surface which was atomically flat on a large (∼100μm×50μm) scale. Newly nucleated widely spaced steps moved at a constant velocity. For more narrowly spaced steps, diffusion mediated step-step interactions reduced the step velocity. To further probe these interactions, steps were made to collide. In destructive collisions, steps decelerated and flattened. In constructive collisions double atomic steps were produced. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.2737
DOI:
10.1103/PhysRevLett.82.2737
PACS:
68.35.Fx, 61.16.Bg, 68.35.Bs, 81.10.Aj
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