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Substrate induced nanoscale resistance variation in epitaxial graphene

Author

Listed:
  • Anna Sinterhauf

    (Georg-August-Universität Göttingen)

  • Georg A. Traeger

    (Georg-August-Universität Göttingen)

  • Davood Momeni Pakdehi

    (Physikalisch-Technische Bundesanstalt)

  • Philip Schädlich

    (Technische Universität Chemnitz
    Technische Universität Chemnitz)

  • Philip Willke

    (Institute for Basic Science (IBS)
    Ewha Womans University)

  • Florian Speck

    (Technische Universität Chemnitz
    Technische Universität Chemnitz)

  • Thomas Seyller

    (Technische Universität Chemnitz
    Technische Universität Chemnitz)

  • Christoph Tegenkamp

    (Technische Universität Chemnitz)

  • Klaus Pierz

    (Physikalisch-Technische Bundesanstalt)

  • Hans Werner Schumacher

    (Physikalisch-Technische Bundesanstalt)

  • Martin Wenderoth

    (Georg-August-Universität Göttingen)

Abstract

Graphene, the first true two-dimensional material, still reveals the most remarkable transport properties among the growing class of two-dimensional materials. Although many studies have investigated fundamental scattering processes, the surprisingly large variation in the experimentally determined resistances is still an open issue. Here, we quantitatively investigate local transport properties of graphene prepared by polymer assisted sublimation growth using scanning tunneling potentiometry. These samples exhibit a spatially homogeneous current density, which allows to analyze variations in the local electrochemical potential with high precision. We utilize this possibility by examining the local sheet resistance finding a significant variation of up to 270% at low temperatures. We identify a correlation of the sheet resistance with the stacking sequence of the 6H silicon carbide substrate and with the distance between the graphene and the substrate. Our results experimentally quantify the impact of the graphene-substrate interaction on the local transport properties of graphene.

Suggested Citation

  • Anna Sinterhauf & Georg A. Traeger & Davood Momeni Pakdehi & Philip Schädlich & Philip Willke & Florian Speck & Thomas Seyller & Christoph Tegenkamp & Klaus Pierz & Hans Werner Schumacher & Martin Wen, 2020. "Substrate induced nanoscale resistance variation in epitaxial graphene," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14192-0
    DOI: 10.1038/s41467-019-14192-0
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