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    Effect of dipole corrections and spin orbit coupling on tungsten dichalcogenides monolayer: a in silico first principles study

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    Date
    2018
    Author
    Obodo, Kingsley O.
    Ouma, Cecil N.M.
    Gebreyesus, Grebremedh
    Obodo, Joshua T.
    Braun, Moritz
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    Abstract
    The structural and electronic properties of tungsten dichalogenides compounds (WS 2 , WSe 2 , WTe 2 ) were investigated from first principles calculations. We found that the structural and electronic properties changed both as a function of the dipole corrections and spin-orbit coupling (SOC). Comparing the calculated results with experimental values, we found that introducing SOC by itself in these 2D materials grossly underestimates the electronic band gap. Adding the self-consistent dipole correction results in larger electronic band gap for these tungsten dichalogenide compounds. Thus, the influence of dipole corrections in these 2D WX 2 materials was found to be significant. The SOC are not relevant for these materials and care should be taken on application of these dipole corrections
    URI
    http://hdl.handle.net/10394/31873
    https://ieeexplore.ieee.org/document/8535859
    https://doi.org/10.1109/OI.2018.8535859
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    • Faculty of Engineering [925]
    • Conference Papers - Potchefstroom Campus [534]

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