Interaction of non-equilibrium electrons with phonons in bulk GaN and GaN/AlGaN quantum wells

The analytical theory of non-equilibrium electrons interacting with deforma tion acoustic, piezoacoustic and polar optical phonons in GaN-based quantum wells and bulk GaN is developed taking into account multi-subband populati on. The new distribution functions thus obtained are used for the calculati on of the electric field dependence of the electron mobility and the averag e electron kinetic energy. The theory provides a self-consistent transition from the two-dimensional to the three-dimensional regimes of electron tran sport in quantum wells with increasing external electric field, (C) 1999 El sevier Science B.V. All rights reserved.