Orbital embedding and topology of one-dimensional two-band insulators

  title={Orbital embedding and topology of one-dimensional two-band insulators},
  author={J N Fuchs and Fr'ed'eric Pi'echon},
  journal={Physical Review B},
The topological invariants of band insulators are usually assumed to depend only on the connectivity between orbitals and not on their intra-cell position (orbital embedding), which are a separate piece of information in the tight-binding description. For example, in two dimensions (2D), the orbital embedding is known to change the Berry curvature but not the Chern number. Here, we consider 1D inversion-symmetric insulators classified by a Z2 topological invariant θ = 0 or π, related to the Zak… 

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