Imaging diffusion fields on a surface with multiple reconstructions: Ag/Si(111)

Details Imaging diffusion fields on a surface with multiple reconstructions: Ag/Si(111) Imaging diffusion fields on a surface with multiple reconstructions: Ag/Si(111)

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12j3019w&link_type=abstract

New Journal of Physics, Volume 12, Issue 10, pp. 103019 (2010).

Physics

Scientific paper

Photoemission electron microscopy is used for studying the thermal decay of Ag islands grown epitaxially on a Si(111) surface. During the decay, the islands feed adatoms to the surrounding surface. The adatoms diffuse and eventually desorb, resulting in a radial coverage gradient that induces the formation of two concentric reconstructed zones, namely (\sqrt{3}\times\sqrt{3})\mbox{-}R30^{\circ} and (3×1), around each island. We have developed a diffusion model to describe this multizone formation and demonstrate how diffusion constants can be determined for different reconstructed phases in a simple experiment.

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