Science Advances

Supplementary Materials

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  • Supplementary Text
  • fig. S1. Nested entanglement and Wilson loop spectra for the second-order 3D
    chiral TI model defined in Eq. 1 in the main text with M/t = 2 and Δ1/t = Δ2/t = 1.
  • fig. S2. Real-space hopping picture for the optical lattice model H4 = Σij›e(x,y)(tij(x,y)cz,icz,j + tijzcz,icz+1, j) .
  • fig. S3. Real-space structure for a chiral HOTI.
  • fig. S4. Constraints on mirror-symmetric domain wall modes in two dimensions.
  • fig. S5. Wilson loop characterization of helical HOTIs.
  • fig. S6. Band structure of the surface Dirac cones of the topological crystalline insulator SnTe calculated in a slab geometry.
  • fig. S7. High-symmetry points in the BZ of SnTe.
  • References (36–40)

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