X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface

D. M. Goodner, D. L. Marasco, A. A. Escuadro, L. Cao, B. P. Tinkham, M. J. Bedzyk*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Sub-monolayer surface phases of Sr on Si(0 0 1) have been studied with low-energy electron diffraction (LEED) and X-ray standing waves (XSW). A (3 × 1) phase was observed after depositing 0.6-0.8 ML Sr on room-temperature Si(0 0 1). Annealing at 750-800 °C caused a portion of the Sr to desorb and resulted in a sharp (2 × 3) LEED pattern. Normal Si(0 0 4) and off-normal Si(0 2 2) and Si(1 1 1) XSW measurements made on the (2 × 3) phase indicate that Sr atoms must sit at either cave or bridge sites. The XSW results also suggest that if a sufficiently low anneal temperature is used, the (2 × 3) phase co-exists with short-range ordered regions of Sr atoms located at valley-bridge sites.

Original languageEnglish (US)
Pages (from-to)19-26
Number of pages8
JournalSurface Science
Volume547
Issue number1-2
DOIs
StatePublished - Dec 10 2003

Keywords

  • Alkaline earth metals
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Molecular beam epitaxy
  • Silicon
  • Surface structure, morphology, roughness, and topography
  • X-ray standing waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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