Dissipative transport in superlattices within the Wigner function formalism
O. Jonasson, I. Knezevic
TL;DR
This paper uses the Wigner function formalism to simulate dissipative electron transport in semiconductor superlattices, accurately reproducing experimental current-field characteristics at low temperature.
Contribution
It introduces a novel collision integral model for energy dissipation, momentum relaxation, and coherence decay within the Wigner transport framework.
Findings
Successful simulation of current density vs. field in GaAs/AlGaAs superlattice
Accurate reproduction of experimental transport characteristics
Demonstration of quantum transport modeling at low temperature
Abstract
We employ the Wigner function formalism to simulate partially coherent, dissipative electron transport in biased semiconductor superlattices. We introduce a model collision integral with terms that describe energy dissipation, momentum relaxation, and the decay of spatial coherences (localization). Based on a particle-based solution to the Wigner transport equation with the model collision integral, we simulate quantum electronic transport at 10 K in a GaAs/AlGaAs superlattice and accurately reproduce its current density vs field characteristics obtained in experiment.
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