Electron–phonon interaction in quantum wells based on uniaxial materials

The interaction of charged particles with interface optical phonons in quantum wells composed of uniaxially symmetric materials is studied theoretically. It is shown that the character of this interaction depends considerably on the degree of anisotropy of the phonon spectrum in the materials forming the quantum well and the barriers. In the case of strong anisotropy, the interaction turns out to be significantly weaker than it is in similar structures made of materials with cubic symmetry. In the case of weak phonon anisotropy, the interaction of charged particles with optical phonons can under certain conditions be described by a Fröhlich-type coupling constant, and both weak and strong electron–phonon interaction can take place in different structures. The results obtained extend the possibilities of the optical diagnostics of quantum nanostructures.