Corpus ID: 235359274

Spin-Polarized Fractional Corner Charges and Their Photonic Realization

  title={Spin-Polarized Fractional Corner Charges and Their Photonic Realization},
  author={R. Gladstone and Minwoo Jung and G. Shvets},
We demonstrate that a spin degree of freedom can introduce additional texture to higher order topological insulators (HOTIs), manifesting in novel topological invariants and phase transitions. Spin-polarized mid-gap corner states of various multiplicities are predicted for different HOTI phases, and novel bulk-boundary correspondence principles are defined based on bulk invariants such as total and spin corner charge. Those are shown to be robust to spin-flipping perturbations. Photonic… Expand

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