Topological Invariants of a Filling-Enforced Quantum Band Insulator

ORAL

Abstract


In the classical picture of insulators, electrons occupy localized Wannier (atomic-like) orbitals. Recently, insulators for which electron filling prohibits this atomic description have been theoretically proposed. The electronic wave functions of these insulators, termed filling-enforced Quantum Band Insulators (feQBIs), display a necessary degree of quantum entanglement due to the non-atomic filling. Currently, little is known about the relation between feQBIs and conventional topological invariants. In this work, we study such relations for a particularly interesting example of an feQBI realized with spinless fermions in space group 106.

–

Presenters

  • Abijith Krishnan

    • Harvard University

Authors

  • Abijith Krishnan

    • Harvard University

  • Hoi Chun Po

    • Massachusetts Institute of Technology
    • MIT
    • Department of Physics, MIT
    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT

  • Ashvin Vishwanath

    • Harvard University
    • Physics, Harvard University
    • Department of Physics, Harvard University