Journal
SURFACE SCIENCE
Volume 712, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.susc.2021.121887
Keywords
Lead; Gold; Silicon; Monolayer; Surface relaxation and reconstruction; Surface structure; morphology; Roughness and topography; Scanning tunneling microscopy; Gundlach oscillation
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Funding
- Labex Matisse
- Nexans Chair of the ESPCI Georges Charpak Endowment Fund through the PhaseOnSi project
- French national research agency [ANR-15-CE30-0026]
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Under specific conditions, the sequential growth of Au and Pb on Si(111) leads to a significant modification of the surface structure, creating a terraced-hill structure covered with a dense monolayer of Pb and decorated with double rows of Au atoms.
Under specific conditions, the sequential growth of Au and Pb on Si(111) results in a huge modification of the surface structure which neither Au/Si nor Pb/Si growths provoke separately. Initially atomically flat 7x7 Si(111) substrate breaks into a terraced-hill structure containing up to 10 atomic terraces of a typical width 10-50 nm. Terraces are covered by a dense monolayer of Pb (nominal coverage 1.2 to 1.33 ML); their step edges are decorated by double rows of Au atoms. This could open a route for constructing superconducting Josephson devices on atomic scale.
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