Title of article :
X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface
Author/Authors :
Goodner، نويسنده , , D.M. and Marasco، نويسنده , , D.L. and Escuadro، نويسنده , , A.A. and Cao، نويسنده , , L. and Tinkham، نويسنده , , B.P. and Bedzyk، نويسنده , , M.J.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2003
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.
Keywords :
Low energy electron diffraction (LEED) , surface structure , morphology , Roughness , Low index single crystal surfaces , and topography , Alkaline earth metals , Silicon , Molecular Beam Epitaxy , X-ray standing waves
Journal title :
Surface Science
Journal title :
Surface Science
