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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2022

Boundary condition analysis of first and second order topological insulators

Xi Wu
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Résumé

We analytically study boundary conditions of the Dirac fermion models on a lattice, which describe the first and second order topological insulators. We obtain the dispersion relations of the edge and hinge states by solving these boundary conditions, and clarify that the Hamiltonian symmetry may provide a constraint on the boundary condition. We also demonstrate the edge-hinge analog of the bulk-edge correspondence, in which the nontrivial topology of the gapped edge state ensures gaplessness of the hinge state.
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Dates et versions

hal-03898705 , version 1 (19-01-2024)

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Xi Wu, Taro Kimura. Boundary condition analysis of first and second order topological insulators. Journal of Physics: Condensed Matter, 2022, 34 (48), pp.485001. ⟨10.1088/1361-648X/ac9815⟩. ⟨hal-03898705⟩
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