Theory of transmission through disordered superlattices

Andreas Wacker, Ben Yu-Kuang Hu

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    Abstract

    We derive a theory for transmission through disordered finite superlattices in which the interface roughness scattering is treated by disorder averaging. This procedure permits efficient calculation of the transmission through samples with large cross sections. These calculations can be performed utilizing either the Keldysh or the Landauer-Buttiker transmission formalisms, both of which yield identical equations. For energies close to the lowest miniband, we demonstrate the accuracy of the computationally efficient Wannier-function approximation. Our calculations indicate that the transmission is strongly affected by interface roughness and that information about scale and size of the imperfections can be obtained from transmission data. [S0163-1829(99)01946-3].
    Original languageEnglish
    JournalPhysical Review B
    Volume60
    Issue number23
    Pages (from-to)16039-16049
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1999

    Bibliographical note

    Copyright (1999) by the American Physical Society.

    Keywords

    • DEVICES
    • SCATTERING
    • INTERFACE
    • ROUGHNESS
    • ELECTRON-TRANSPORT

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