Phonon dispersion curves of GaAsAlAs superlattices |
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| Affiliation: | 1. Department of Physics and Electronics, National University of Lesotho, Southern Africa;2. Department of Physics, GLA University, Mathura-281406, India |
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| Abstract: | The phonon properties of (GaAs)m(AlAs)n superlattices are studied with an eleven-parameter rigid-ion model. Short-range interactions up to the second neighbours are included, and the long-range Coulomb interaction is calculated exactly. Modes propagating both normal (k// = 0) oblique (k// ≡ 0) to the interfaces are studied. Anisotropy of zone center optical phonons is examined. The theoretical results are compared with the existing experimental data with favorable agreement. |
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