Hydrodynamic theory of partially degenerate electron-hole fluids in semiconductors

Akbari-Moghanjoughi, M and Eliasson, B (2016) Hydrodynamic theory of partially degenerate electron-hole fluids in semiconductors. Physica Scripta, 91 (10). 105601. ISSN 0031-8949 (https://doi.org/10.1088/0031-8949/91/10/105601)

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Abstract

A quantum hydrodynamic (QHD) theory for high-frequency electron-hole Langmuir and acoustic-like oscillations as well as static charge shielding effects in arbitrarily doped semiconductors is presented. The model includes kinetic corrections to the quantum statistical pressure and to the quantum Bohm potential for partially degenerate electrons and holes at finite temperatures. The holes contribute to the oscillations and screening effects in semiconductors in a similar manner as real particles. The dielectric functions are derived in the high-frequency limit for wave excitations and in the low-frequency limit for the study of static screening. The dispersion relation for the Langmuir and acoustic-like oscillations is examined for different parameters of doped silicon (Si). Some interesting properties and differences of electron hole dynamical behavior in N- and P-type Si are pointed out. Holes are also observed to enhance an attractive charge shielding effect when the semiconductor is highly acceptor-doped.

  • Item type:Article
    ID code:57252
    Dates:
    Date
    Event
    1 September 2016
    Published
    3 August 2016
    Accepted
    Notes:This is an author-created, un-copyedited version of an article accepted for publication/published in Physica Scripta. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://iopscience.iop.org/article/10.1088/0031-8949/91/10/105601
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:04 Aug 2016 08:19
    Last modified:11 Apr 2024 01:12
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/57252
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