Mapping the Density of States in Twisted Trilayer Graphene

ORAL

Abstract

Twisted trilayer graphene with mirror symmetry can be created by twisting the top and bottom layers by angles of θ and - θ with respect to the center layer. This system has been extensively studied because of the robust nature of the superconducting regime and the relative ease of creating the heterostructure due to the top and bottom layers locking into angular alignment. The additional Dirac cone of the system compared to twisted bilayer graphene changes the properties of the system and gives rise to more diverse phenomena. To explore the effects of the additional third layer we map the band structure for various twist angles in several different devices. Using scanning tunneling microscopy and spectroscopy at 4.5 K we obtain local density of states maps and dI/dV curves for these devices.

*The work at the University of Arizona was supported by the Army Research Office under grant W911NF-20-1-0215 and the National Science Foundation under grant ECCS-2122462.

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Presenters

  • Rachel L Nieken

    • University of Arizona

Authors

  • Rachel L Nieken

    • University of Arizona

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • John Schaibley

    • University of Arizona

  • Brian J LeRoy

    • University of Arizona