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Electron-confined LO-phonon scattering in GaAs-Al0.45Ga0.55As superlattice

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Abstract

We develop a theoretical model to the scattering time due to the electron-confined LO-phonon in GaAs-AlxGa1-xAs superlattice taking into account the sub-band parabolicity. Using the new analytic wave function of electron miniband conduction of superlattice and a reformulation slab model for the confined LO-phonon modes, an expression for the electron-confined LO-phonon scattering time is obtained. In solving numerically a partial differential equation for the phonon generation rate, our results show that forx = 0.45, the LO-phonon in superlattice changes from a bulk-like propagating mode to a confined mode. The dispersion of the relaxation time due to the emission of confined LO-phonons depends strongly on the total energy.

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Authors and Affiliations

  1. Physics Department, Faculty of Sciences-Semlalia, L.P.S.C.M., BP:2390, 40000, Marrakech, Morocco

    D. Abouelaoualim

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Abouelaoualim, D. Electron-confined LO-phonon scattering in GaAs-Al0.45Ga0.55As superlattice. Pramana - J Phys 66, 455–465 (2006). https://doi.org/10.1007/BF02704398

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