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Effect of Miniband Dispersion on Inelastic Scattering of Superlattice Electrons by Acoustic Phonons

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Abstract

Within the framework of the Boltzmann equation, formulas for calculating the effective relaxation time and mobility of superlattice electrons are derived with allowance for inelastic scattering on acoustic phonons and dispersion of the miniband energy spectrum depending on the longitudinal wave vector. The dependences of longitudinal and transverse mobilities of the nondegenerate electronic gas of the GaAs/Al0.36Ga0.64As superlattice with the quantum well 5 nm wide on the potential barrier width and temperature are analyzed numerically. It is demonstrated that inelasticity of scattering and miniband dispersion significantly increase the electron mobility, and its temperature dependence becomes more pronounced at low temperatures.

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  1. V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University, Russia

    S. I. Borisenko

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  1. S. I. Borisenko
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Borisenko, S.I. Effect of Miniband Dispersion on Inelastic Scattering of Superlattice Electrons by Acoustic Phonons. Russian Physics Journal 46, 262–269 (2003). https://doi.org/10.1023/A:1025433727245

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