Abstract
The properties of optical phonons and excitons in four zinc-compound quantum wells, in which the well layers are made of ternary mixed crystals, are investigated theoretically. The optical phonon frequencies and the electron–LO-phonon coupling constants of the well materials are calculated by using a mixed crystal theory. The interface optical phonon energies and dispersion relations, the exciton binding energies and the exciton–LO-phonon interaction energies are calculated as functions of the well width and the concentration x. The effects of the mixed crystal on the exciton–optical-phonon interaction in the quantum wells are discussed.
- Received 13 August 1999
DOI:https://doi.org/10.1103/PhysRevB.61.9960
©2000 American Physical Society