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Overlayer

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An overlayer is a layer of adatoms adsorbed onto a surface, for instance onto the surface of a single crystal.

Overlayers on single crystals

Adsorbed species on single crystal surfaces are frequently found to exhibit long-range ordering; that is to say that the adsorbed species form a well-defined overlayer structure. Each particular structure may only exist over a limited coverage range of the adsorbate, and in some adsorbate/substrate systems a whole progression of adsorbate structure are formed as the surface coverage is gradually increased[1].


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  1. ^ http://www.chem.qmul.ac.uk/surfaces/scc/
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