Probing the electronic transport on the reconstructed Au/Ge(001) surface.
Beilstein J Nanotechnol
; 5: 1463-71, 2014.
Article
em En
| MEDLINE
| ID: mdl-25247129
ABSTRACT
By using scanning tunnelling potentiometry we characterized the lateral variation of the electrochemical potential µec on the gold-induced Ge(001)-c(8 × 2)-Au surface reconstruction while a lateral current flows through the sample. On the reconstruction and across domain boundaries we find that µec shows a constant gradient as a function of the position between the contacts. In addition, nanoscale Au clusters on the surface do not show an electronic coupling to the gold-induced surface reconstruction. In combination with high resolution scanning electron microscopy and transmission electron microscopy, we conclude that an additional transport channel buried about 2 nm underneath the surface represents a major transport channel for electrons.
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MEDLINE
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En
Ano de publicação:
2014
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Article