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Restructuring process of the Si(111) surface upon Ca deposition

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
448
Identifiers
DOI: 10.1016/s0039-6028(99)00963-2
Keywords
  • Alkaline Earth Metal
  • Atom–Solid Interactions
  • Auger Electron Spectroscopy
  • Low Energy Electron Diffraction (Leed)
  • Scanning Tunneling Microscopy
  • Silicon
  • Surface Structure
  • Morphology
  • Roughness And Topography

Abstract

Abstract Using scanning tunneling microscopy and high-resolution spot profile analysis low-energy electron diffraction (SPA-LEED), the process of Si(111)3×1-Ca phase formation induced by Ca adsorption on Si(111)7×7 samples has been studied. Our observation revealed that what has been considered to be 3×1 reconstruction is actually a mixture of 3×2 and c(6×2) reconstructions. The redistribution of Si atoms in a top Si(111) layer has been found to play a critical role in the Si(111)3×2-Ca growth. From the quantitative consideration of Si mass transport balance, top Si atom density of Si(111)3×2-Ca phase has been determined to be a 4/3 monolayer.

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