Many-Body Interactions in the Cyclotron Resonance of Encapsulated Graphene

ORAL

Abstract

We present observations of interband Landau level transitions in high-mobility graphene encapsulated in hexagonal boron nitride by way of Fourier-transform infrared magneto-spectroscopy. By varying the carrier density, n, at constant magnetic field, B, we observe a non-monotonic dependence of the transition energies on the Landau level filling factor, $\nu \propto$ n/B. These findings support the idea that electron-electron interactions contribute to the Landau level transition energies in graphene, beyond the single-particle picture. A splitting of transitions involving the zeroth Landau level is interpreted as a Dirac mass arising from the coupling of the graphene and hBN lattices. Additionally, we report recent work on the intraband Landau level resonances in both encapsulated graphene and graphene on silicon dioxide.

*Washington University in St. Louis

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Presenters

  • Billy Russell

    • Washington University in St. Louis

Authors

  • Billy Russell

    • Washington University in St. Louis

  • Boyi Zhou

    • Washington University in St. Louis
    • Physics, Washington University in St. Louis

  • Jesse Balgley

    • Washington University
    • Washington University in St. Louis

  • Takashi Taniguchi

    • National Institute for Materials Science
    • NIMS
    • National Institute for Material Science
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science (NIMS
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Advanced Materials Laboratory
    • National Institue for Materials Science
    • National Institute of Material Science
    • National Institute for Matericals Science
    • Advanced Materials Laboratory
    • National Institute for Materials Science, 1-1 Namiki
    • NIMS-Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • National Institute for Material Science
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science (NIMS
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Advanced Materials Laboratory
    • National Institue for Materials Science
    • National Institute of Material Science
    • National Institute for Matericals Science
    • Advanced Materials Laboratory
    • National Institute for Materials Science, 1-1 Namiki
    • Advanced materials laboratory, National institute for Materials Science
    • NIMS-Japan

  • Erik Henriksen

    • Department of Physics, Washington University in St. Louis
    • Washington University in St. Louis
    • Physics, Washington University in St. Louis