Anisotropy of optical phonons in GaAs-AlAs superlattices
Abstract
Phonon dispersion curves of GaAs-AlAs superlattices for various directions of propagation are examined with a detailed microscopic model which takes into account the long-range Coulomb interaction. The anisotropy of the long-wavelength optical modes and its relation with the interface modes are studied. Our theoretical predictions are in accord with the experimental data.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1987
- DOI:
- 10.1103/PhysRevLett.59.1841
- Bibcode:
- 1987PhRvL..59.1841R
- Keywords:
-
- Gallium Arsenides;
- Phonons;
- Superlattices;
- Solid-State Physics;
- 63.20.Dj;
- 78.30.Fs;
- Phonon states and bands normal modes and phonon dispersion;
- III-V and II-VI semiconductors