Dissipative transport in superlattices within the Wigner function formalism

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)....

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Bibliographic Details
Published in:Journal of computational electronics 2015-12, Vol.14 (4), p.879-887
Main Authors: Jonasson, O., Knezevic, I.
Format: Article
Language:English
Subjects:
Approximation
Bias
Decoherence
Density matrix
Dissipation
Electric fields
Electrical Engineering
Electron transport
Energy dissipation
Engineering
Formalism
Fourier transforms
Mathematical and Computational Engineering
Mathematical and Computational Physics
Mechanical Engineering
NANOSCIENCE AND NANOTECHNOLOGY
Optical and Electronic Materials
Particle decay
Physics
Quantum transport
Superlattice
Superlattices
Theoretical
Transport equations
Wigner function
Wigner transport equation
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Summary: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.
ISSN:1569-8025
1572-8137
DOI:10.1007/s10825-015-0734-9