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Scattering by polar optical phonons in nitride single heterostructures

The scattering rates due to the interaction between conduction band electrons and polar optical phonons are calculated in a single heterostructure of the AlxGa1−xN prototype. Optical phonon modes are described via the dielectric continuum model for the case of the wurtzite crystal structure, taking into account both interface and half-space oscillations. Electronic states in the two-dimensional electron gas are studied with the use of a variational scheme that provides both the wavefunctions and the conduction band bending profile in the quantum well region.