Si-Ge STRAINED LAYER SUPERLATTICES

Abstract
We report on growth and properties of Si/SiGe strained layer superlattices. Critical thicknesses and relaxation processes in single layers are studied with Raman spectroscopy, LEED, and TEM. Phonon Raman scattering is used to determine built-in strain and period length of superlattices. Transport measurements show mobility enhancement in selectively doped samples. The ordering of electronic bands due to strain yields to two-dimensional electron gases in Si

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