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.
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Presenters
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Abijith Krishnan
Harvard University
Authors
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Abijith Krishnan
Harvard University
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Hoi Chun Po
Massachusetts Institute of Technology, MIT, Department of Physics, MIT, Department of Physics, Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT
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Ashvin Vishwanath
Harvard University, Physics, Harvard University, Department of Physics, Harvard University