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Effects of impurity scattering on electron-phonon resonances in semiconductor superlattice high-field transport

Shaoxin Feng·Christoph H. Grein·Michael E. Flatte
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Abstract

A non-equilibrium Green's function method is applied to model high-field quantum transport and electron-phonon resonances in semiconductor superlattices. The field-dependent density of states for elastic (impurity) scattering is found non-perturbatively in an approach which can be applied to both high and low electric fields. I-V curves, and specifically electron-phonon resonances, are calculated by treating the inelastic (LO phonon) scattering perturbatively. Calculations show how strong impurity scattering suppresses the electron-phonon resonance peaks in I-V curves, and their detailed sensitivity to the size, strength and concentration of impurities.

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Shaoxin Feng, Christoph H. Grein, Michael E. Flatte. 2003-03-14. Effects of impurity scattering on electron-phonon resonances in semiconductor superlattice high-field transport. https://doi.org/10.1103/physrevb.68.085307

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