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Superconductivity in Twisted Trilayer Graphene Supermoiré

ORAL

Abstract

The supermoiré lattice, arising from the interference of multiple moiré patterns, dynamically reshapes the electronic band structure by introducing new mini-bands and modifying band dispersion. Concurrently, strong electronic interactions within moiré flat bands lead to the emergence of various correlated states. However, the impact of the supermoiré lattice on the flat band systems with strong interactions remains largely unexplored. Here, we report the existence of the supermoiré lattice in the mirror-symmetry-broken twisted trilayer graphene, elucidating its role in generating mini flat bands and mini Dirac bands. We demonstrate interaction-induced symmetry-broken phases in the supermoiré mini flat bands alongside the cascade of multiple superconductor-insulator transitions enabled by the supermoiré lattice. Our work underscores the significance of the supermoiré lattice as an additional degree of freedom for tuning the electronic properties of twisted multilayer systems.

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Presenters

  • Zekang Zhou

    Federal Institute of Technology (EPFL)

Authors

  • Zekang Zhou

    Federal Institute of Technology (EPFL)

  • Cheng Shen

    EPFL

  • Kryštof Kolář

    Freie Universität Berlin

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, Research Center for Functional Materials, National Institute for Materials Science, Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan, National Institute of Materials Science, Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    National Institute for Materials Science, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science

  • Cyprian K Lewandowski

    National High Magnetic Field Laboratory, Florida State University

  • Mitali Banerjee

    EPF PHB-ECUBLENS, Ecole Polytechnique Federal de Lausanne (EPFL)