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.

*This work was supported by the Netherlands Organisation for Scientific Research (NWO/OCW), as part of the Frontiers of Nanoscience program.

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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