Majorana Flat Bands in S -Wave Gapless Topological Superconductors

@article{Deng2014MajoranaFB,
  title={Majorana Flat Bands in S -Wave Gapless Topological Superconductors},
  author={Shusa Deng and G. Ortiz and A. Poudel and L. Viola},
  journal={Physical Review B},
  year={2014},
  volume={89},
  pages={140507}
}
  • Shusa Deng, G. Ortiz, +1 author L. Viola
  • Published 2014
  • Physics
  • Physical Review B
  • We demonstrate how the non-trivial interplay between spin-orbit coupling and nodeless $s$-wave superconductivity can drive a fully gapped two-band topological insulator into a time-reversal invariant gapless topological superconductor supporting symmetry-protected Majorana flat bands. We characterize topological phase diagrams by a ${\mathbb Z}_2 \times{\mathbb Z}_2$ partial Berry-phase invariant, and show that, despite the trivial crystal geometry, no unique bulk-boundary correspondence exists… CONTINUE READING
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