Surface structures and conductance at epitaxial growths of Ag and Au on the Si(111) surface
1992; American Physical Society; Volume: 68; Issue: 8 Linguagem: Inglês
10.1103/physrevlett.68.1192
ISSN1092-0145
Autores Tópico(s)Electron and X-Ray Spectroscopy Techniques
ResumoIn situ measurements of surface conductance, combined with simultaneous observations of reflection high-energy electron diffraction, clearly demonstrated strong dependence of the conductance on substrate-surface structures and epitaxial growth styles at early stages of Ag and Au depositions on Si(111) surface at room temperature. The conductance showed a large change with a small amount of deposition (0.1 monolayer) on the substrate of a metal-induced superstructure (\ensuremath{\surd}3 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}3 -Ag or 5\ifmmode\times\else\texttimes\fi{}2-Au), while it scarcely changed for a clean 7\ifmmode\times\else\texttimes\fi{}7 substrate. The results are discussed in terms of the Fermi-level pinning and space-charge layers.
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