Material Lattice Design of 3D Flat Bands

ORAL

Abstract

The realization of bulk flat bands owing to destructive hopping of model lattice systems is a promising route that can be expected to lead to exotic correlated and topological phenomena. However, most current experimental work is limited to twisted moiré heterostructures and 2D toy model systems such as Kagome materials. In bulk materials a 2D sublattice pattern can only guarantee band flatness in the 3D dimension via a generic lack of hopping weights rather than the deconstructive interference of the wavefunction that guarantees the band flatness within the 2D plane. We here discuss material structures for 3D hopping networks that become topological upon inclusion of spin orbit coupling. We demonstrate different origins for band flatness and their potential electronic signatures.

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Presenters

  • Joshua Wakefield

    • Massachusetts Institute of Technology MIT

Authors

  • Joshua Wakefield

    • Massachusetts Institute of Technology MIT

  • Paul M Neves

    • Massachusetts Institute of Technology MIT

  • Shiang Fang

    • Massachusetts Institute of Technology

  • Ryan McTigue

    • Massachusetts Institute of Technology

  • Shu Yang Frank Zhao

    • MIT
    • Massachusetts Institute of Technology

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University

  • Jessica L McChesney

    • Argonne National Laboratory

  • Tej Lamichhane

    • Massachusetts Institute of Technology

  • Mingda Li

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Takehito Suzuki

    • Massachusetts Institute of Technology MIT

  • Joseph G Checkelsky

    • Massachusetts Institute of Technology MIT