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

Article

关键词: QUANTUM TRANSPORT;    BLOCH OSCILLATIONS;    BOLTZMANN-EQUATION;    CONDUCTION;    MINIBAND;   

DOI  :  10.1103/PhysRevB.68.085307

来源: SCIE

【 摘 要 】

A nonequilibrium 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 nonperturbatively 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.

【 授权许可】

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