Island Size and Environment Dependence of Adatom Capture: Cu/Co Islands on Ru(0001)
- 31 August 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 81 (9) , 1901-1904
- https://doi.org/10.1103/physrevlett.81.1901
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.Keywords
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