Island Size and Environment Dependence of Adatom Capture: CuyCo Islands on Ru(0001)

Date
1998-08-01
Authors
Bartelt, M.
Schmid, A.
Evans, James
Hwang, R.
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Ames Laboratory
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Mathematics
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Abstract

We quantify the rate of capture by Co islands on Ru(0001) of additionally deposited Cu atoms, using scanning tunneling microscopy. The dependence of the capture rates on Co-island size is shown to reflect larger island-free areas surrounding bigger islands, a feature neglected in mean-field treatments. We also find a strong direction dependence in Cu adatom capture, reflecting the local environment of individual islands. These features are elucidated by simulations and diffusion equation analyses.

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This article is from Physical Review Letters 81 (1998): 1901, doi: 10.1103/PhysRevLett.81.1901.

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