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

SURFACE SCIENCE

卷:712

Article

Baptista, Jonathan¹  Vlaic, Sergio¹  Cofler, Enrico¹  Roditchev, Dimitri^1,2  Pons, Stephane¹ 

[1] Sorbonne Univ, Univ PSL, CNRS UMR8213, Lab Phys & Etud Mat,ESPCI Paris, F-75005 Paris, France

[2] Sorbonne Univ, CNRS UMR7588, Inst Nanosci Paris, F-75005 Paris, France

关键词: Lead;    Gold;    Silicon;    Monolayer;    Surface relaxation and reconstruction;    Surface structure;    morphology;    Roughness and topography;    Scanning tunneling microscopy;    Gundlach oscillation;   

DOI  :  10.1016/j.susc.2021.121887

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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