Weyl semimetal in a topological insulator multilayer.

@article{Burkov2011WeylSI,
  title={Weyl semimetal in a topological insulator multilayer.},
  author={Anton A. Burkov and Leon Balents},
  journal={Physical review letters},
  year={2011},
  volume={107 12},
  pages={
          127205
        }
}
We propose a simple realization of the three-dimensional (3D) Weyl semimetal phase, utilizing a multilayer structure, composed of identical thin films of a magnetically doped 3D topological insulator, separated by ordinary-insulator spacer layers. We show that the phase diagram of this system contains a Weyl semimetal phase of the simplest possible kind, with only two Dirac nodes of opposite chirality, separated in momentum space, in its band structure. This Weyl semimetal has a finite… 

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