Topological dipole conserving insulators and multipolar responses

@article{MayMann2021TopologicalDC,
  title={Topological dipole conserving insulators and multipolar responses},
  author={Julian May-Mann and Taylor L. Hughes},
  journal={Physical Review B},
  year={2021}
}
Higher order topological insulators (HOTIs) are a novel form of insulating quantum matter, which are characterized by having gapped boundaries that are separated by gapless corner or hinge states. Recently, it has been proposed that the essential features of a large class of HOTIs are captured by topological multipolar response theories. In this work, we show that these multipolar responses can be realized in interacting lattice models, which conserve both charge and dipole. In this work we… Expand

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