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Article Dans Une Revue IEEE Transactions on Electron Devices Année : 2020

Full-Band Quantum Transport of Heterojunction Electron Devices With Empirical Pseudopotentials

Adel M'Foukh
  • Fonction : Auteur
Marco G. Pala
David Esseni
  • Fonction : Auteur

Résumé

This paper presents the methodology, implementation and application of a full-band quantum transport model based on the non-equilibrium Green's function formalism and the empirical pseudopotentials. In particular the paper reports the treatment of heterojunctions between lattice matched semiconductors, comprising a gradual transition region described according to a virtual crystal approximation. Our approach entails several numerical techniques to make the full-band quantum transport method computationally affordable, and thus enable robust and efficient self-consistent device simulations. Then we employ our simulation scheme for the analysis of some exemplary devices based on quantum tunnelling, such as an Esaki tunnelling diode, as well as n-and p-type heterojunction Tunnel FETs. In particular we investigate the influence on the current-voltage characteristics of the width of the heterojunction transition region. We observe that a gradual transition region mainly affects the device characteristics by lengthening the tunnelling path at the heterojunction, which has a different impact on device current depending on the external bias conditions.
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Dates et versions

hal-03029917 , version 1 (16-12-2020)

Identifiants

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Adel M'Foukh, Marco G. Pala, David Esseni. Full-Band Quantum Transport of Heterojunction Electron Devices With Empirical Pseudopotentials. IEEE Transactions on Electron Devices, 2020, 67 (12), pp.5662-5668. ⟨10.1109/TED.2020.3029548⟩. ⟨hal-03029917⟩
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