Coadsorption of Au and Ag atoms on the Si(111) surface

A three-component surface phase formed by codeposition of Au and Ag on Si(111) has been studied with Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). It has been shown that if the amount of silver atoms on the surface exceeds a certain value (which is dependent on the Au...

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Bibliographic Details
Published in:Surface science 1993-12, Vol.297 (3), p.345-352
Main Authors: Gavriljuk, Y.L., Lifshits, V.G., Enebish, N.
Format: Article
Language:English
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Summary:A three-component surface phase formed by codeposition of Au and Ag on Si(111) has been studied with Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). It has been shown that if the amount of silver atoms on the surface exceeds a certain value (which is dependent on the Au amount on the Si surface), two types of three-component surface structures may form. In case θ Au < 1 3 ML a solid solution of Au atoms in the Si(111)√3-Ag superlattice is formed; when θ Au> 1 3 ML the Si(111)√21-(Au, Ag) structure is observed.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(93)90222-6