Phonon self-energies in semiconductors: anharmonic and isotopic contributions

During the past ten years, semiconducting crystals with varying isotopic compositions have been grown. They can be used for obtaining detailed information on their lattice dynamics, including dispersion relations, eigenvectors and the self-energies related to anharmonicity and isotopic disorder. Examples involving diamond, zincblende, and wurtzite-type semiconductors are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.