Quenching Rotational Inhomogeneities In Polycrystalline Graphene

ORAL

Abstract

The discovery of tunable superconducting and Mott-insulating phases in twisted bilayer graphene (TBG) has galvanized investigations into a number of techniques for dynamically adjusting small twist angles in graphene heterostructures. Here we use low-energy electron microscopy (LEEM) and low-energy electron diffraction (LEED) to characterize the formation of domains of different rotational orders for in-situ grown graphene on various metallic substrates. These results suggest that LEEM could provide a viable method for characterizing small graphene twist angles in inhomogeneous systems.

*The quantum materials studies were carried out with the Ultrafast Materials Program, supported by the Department of Energy, Department of Energy’s Workforce Development of Teachers and Scientists , Workforce Development & Education at Berkeley Lab, Office of the Basic Energy Sciences, Division of Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231.

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Presenters

  • Samuel Brantly

    • Lawrence Berkeley National Laboratory

Authors

  • Samuel Brantly

    • Lawrence Berkeley National Laboratory

  • Samuel Ciocys

    • University of California, Berkeley
    • Physics, University of California, Berkeley
    • Lawrence Berkeley National Laboratory
    • Department of Physics, University of California Berkeley

  • Kayla Currier

    • Lawrence Berkeley National Laboratory
    • Physics, University of California Berkeley

  • Andreas Schmid

    • Lawrence Berkeley National Laboratory
    • National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA

  • Alessandra Lanzara

    • University of California, Berkeley
    • Department of Physics, University of California
    • Physics, University of California, Berkeley
    • Lawrence Berkeley National Laboratory
    • Department of Physics, University of California Berkeley
    • Physics, University of California Berkeley
    • Physics, UC Berkeley