Abstract
SiGe/Si superlattices were grown using limited reaction processing. Each multilayer structure was fabricated in situ by changing the gas composition between high-temperature cycles. Commensurate SiGe alloy layers as thin as 15 nm were reproducibly deposited and were examined using transmission electron microscopy, sputtering Auger electron spectroscopy, and Rutherford backscattering. Si/SiGe interfaces are abrupt to within a few monolayers, establishing for the first time the use of a chemical vapor deposition technique to fabricate abrupt GeSi/Si-based heterostructures.
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