Abstract
AbstractEpitaxial SiGe/Si heterostructures have been formed by wet oxidation from amorphous SiGe films deposited on Si(100). Amorphous SixGe1-x films were deposited at a vacuum of 10-7 Torr. The presence of an initial native oxide precluded solid phase epitaxy under standard annealing conditions, but epitaxy could be achieved by the use of wet oxidation. The samples were oxidized at 900°C for various times and examined in reflection electron diffraction, ellipsometry, cross-sectional and plan-view transmission electron diffraction, and electron spin resonance. The formation of the epitaxial layer and oxide has been examined, and an epitaxial growth model is suggested.
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