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Twist angle homogeneity in twisted bilayer graphene devices studied with STM

ORAL

Abstract

Theoretic models that describe magic-angle twisted bilayer graphene strongly depend on how homogeneous the twist angle is. It is thus of high importance to characterize the (in)homogeneity experimentally, on the local scale. We use scanning tunneling microscopy to explore several non-encapsulated twisted bilayer graphene devices with different nominal twist angles. In this talk, I present quantitative results of the homogeneity on different length scales.

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Presenters

  • Tjerk Benschop

    Leiden University

Authors

  • Tjerk Benschop

    Leiden University

  • Vincent Stalman

    Leiden University

  • Rosanne Wijgman

    Leiden University

  • Maarten Leeuwenhoek

    Delft University of Technology

  • Petr Stepanov

    ICFO Barcelona, ICFO-The Institute of Photonic Sciences

  • Xiaobo Lu

    ICFO-The Institute of Photonic Sciences, Washington University in St. Louis, Washington University, St. Louis

  • Dmitri Efetov

    ICFO - The Institute of Photonic Sciences, ICFO Barcelona, ICFO-The Institute of Photonic Sciences

  • Milan P. Allan

    Leiden University