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VOLUME 50 | ISSUE 1 | PAGE 24
Raman scattering by folded τα and LA phonons in Si-Si0.5Ge0.5 superlattices
The Raman scattering by acoustic phonons in Si—Si0 5 Ge0 5 superlattices with axis along the (111) direction has been studied. The spectra reveal, in addition to the well-known lines of folded LA phonons, an allowed scattering by folded τα phonons. This is the first observation of the latter type of scattering.




Permission given by American Institute of Physics is appreciated.