Raman scattering by optical phonons was studied in self-assembled Ge quantum dot superlattices. It was found that the GeGe optical phonon frequency was mainly caused by strain relaxation effects. The comparison of experimental and calculated results indicated that the strain relaxation of Ge quantum dot superlattices was not only due to atomic intermixing but also from the morphology transition in dot formation.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)