Interface sharpness in low-order III–V superlattices
✍ Scribed by J. Pellegrino; S.B. Qadri; P.M. Amirtharaj; N.V. Nguyen; J. Comas
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 844 KB
- Volume
- 220
- Category
- Article
- ISSN
- 0040-6090
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Phonons in III-V nitrides are examined experimentally for dimensionally conÿned systems and for alloys of InGaN with a view towards understanding the phonon modes of these systems. Results are compared with the predictions of Loudon's model for uniaxial semiconductors. The modes of the InGaN system
together with tight-binding calculations. We have considered several different types of structural models, including the relaxation model in which surface Ga atoms move into and As atoms move out of, the surface by an amount such that the plane through the nearestneighbour Ga and As atoms makes a ti