Abstract
Raman scattering from folded acoustic phonons in strained-layer superlattices grown by molecular-beam epitaxy is reported. The superlattice periodicity was chosen so that the transferred photon momentum exceeds the minizone momentum , where is the superperiodicity. The observed peaks agree very well with calculations involving umklapp and folding of the scattered phonons into the minizone.
- Received 23 May 1986
DOI:https://doi.org/10.1103/PhysRevB.34.3034
©1986 American Physical Society