Wetting layer formation in superlattices with Ge quantum dots on Si(100)
The influence of parameters of germanium deposition on wetting layer thickness was studied during the growth on the Si(100) surface. A non-monotone dependence of the thickness on growth temperature was discovered and accounted for by changing the mechanism of the layer-by-layer growth. The conclusion was supported by changing the mode of oscillations of the reflection high-energy electron diffraction (RHEED) specular beam. In addition, wetting layer thickness is strongly affected by the replication number and thickness of the silicon spacer due to accumulation of elastic strains throughout the structure.
ge quantum dot diffraction epitaxy si