The interaction Fröhlich-like Hamiltonian between an electron and interface optical phonons in a four-layer heterostructure(FLHS)is obtained by means of the orthonormal eigenmodes of interface optical phonons given recently.The electron-phonon coupling functions and their plots for a FLHS and its special cases,an asymmetric trilayer heterostructure(asymmetric single quantum well)and a step quantum well,are given and discussed.We find that the three branches of higher-frequencies are more important for the electron-phonon interaction than the other three in the six branches of interface modes in a FLHS.Moreover,we also find that the situation in an asymmetric trilayer heterostructure is similar to that of a FLHS.
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机译：Dispersions and frohlich electron-phonon interaction hamiltonian of propagating optical phonon modes in quasi-one-dimensional wurtzite GaN-based quantum well wires
