Lattice dynamics of GaN/AlN superlattices
- Surface Physics Laboratory
- CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (Peoples Repubic of China)
Phonon dispersion curves of cubic (001)-(GaN){sub n}/(AlN){sub n} (n=1{endash}4) superlattices for various propagating directions are calculated. Short-range interactions up to the second-nearest neighbors are described by using a two-parameter Keating model, and the long-range Coulomb interactions are included via an Ewald summation. Raman spectra are calculated by a bond-polarizability model. The confinement of optical modes is discussed. The anisotropies of the zone-center optical phonons are investigated. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 565506
- Journal Information:
- Journal of Applied Physics, Vol. 82, Issue 2; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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