Topological phase transition in the interaction of surface Dirac fermions in heterostructures.

@article{Kim2012TopologicalPT,
  title={Topological phase transition in the interaction of surface Dirac fermions in heterostructures.},
  author={Jeongwoo Kim and Jinwoong Kim and Ki-Seok Kim and Seung-Hoon Jhi},
  journal={Physical review letters},
  year={2012},
  volume={109 14},
  pages={146601}
}
Material with a nontrivial topology in its electronic structure enforces the existence of helical Dirac fermionic surface states. We discover emergent topological phases in the stacked structures of topological insulator and band insulator layers where the surface Dirac fermions interact with each other with a particular helicity ordering. Using first-principles calculations and a model Lagrangian, we explicitly demonstrate that such helicity ordering occurs in real materials of ternary… CONTINUE READING