Dielectric Constant and van der Waals Interlayer Interaction of MoS2-Graphene Heterostructures

Amit Singh, Seunghan Lee, Hoonkyung Lee, Hiroshi Watanabe

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    1 Scopus citations

    Abstract

    The dielectric screening is one of the most fundamental properties of 2D materials which is used to characterize electronic properties such as storage capacity of charge or energy. We numerically investigate three potential heterostructures of MoS2-Graphene and their corresponding interlayer interactions. Applying a density-functional approach to the lowest energy structure of the interlayer, we find that, within a lower field regime (≲ 10 MV/cm), the dielectric constant is independent of the vertical electric field and dependent of the interlayer distance and stacking pattern of heterostructures composed of MoS2 and Graphene. From the calculation results of the induced charge throughout the heterostructure, we find how the van der Waals interaction influences the dielectric constant.

    Original languageEnglish
    Title of host publication15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages490-494
    Number of pages5
    ISBN (Electronic)9781728172309
    DOIs
    StatePublished - 27 Sep 2020
    Event15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020 - Virtual, San Diego, United States
    Duration: 27 Sep 202030 Sep 2020

    Publication series

    Name15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020

    Conference

    Conference15th IEEE International Conference on Nano/Micro Engineered and Molecular System, NEMS 2020
    Country/TerritoryUnited States
    CityVirtual, San Diego
    Period27/09/2030/09/20

    Keywords

    • dielectric constant
    • electric field
    • heterostructures
    • screening
    • van der Waals interactions

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