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Stabilization of dense metallic Pb monolayer by decorating step edges with Au atoms on Si(111)

Abstract : 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 terracedhill 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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https://hal.archives-ouvertes.fr/hal-03238376
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Submitted on : Thursday, May 27, 2021 - 9:39:15 AM
Last modification on : Tuesday, July 13, 2021 - 3:26:46 AM
Long-term archiving on: : Saturday, August 28, 2021 - 6:17:51 PM

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Jonathan Baptista, Sergio Vlaic, Enrico Cofler, Dimitri Roditchev, Stéphane Pons. Stabilization of dense metallic Pb monolayer by decorating step edges with Au atoms on Si(111). Surface Science, Elsevier, 2021, pp.121887. ⟨10.1016/j.susc.2021.121887⟩. ⟨hal-03238376⟩

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