Abstract
Using the transfer matrix method and Fermi's golden rule, we calculate the intersubband transition rates between surface electronic states due to different surface optical phonon modes (SOPMs) for a semi-infinite superlattice (SL) with a cap layer in the dielectric continuum approximation. The influence of various structural configurations on surface electron–phonon scattering is given in detail. The calculated results show that the surface electron–phonon scattering rates are markedly influenced by the magnitude of the in-plane electronic wave vector k‖ and have a complicated dependence on the constituent layers of the SL, the substrate as well as the cap layer. It is found that the magnitude of in-gap electron transition rates essentially depends on the attenuation length of the localized electronic states and SOPMs.
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