Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi2TeI

@inproceedings{Tang2014WeakTI,
  title={Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi2TeI},
  author={Peizhe Tang and Binghai Yan and Wendong Cao and Shu-chun Wu and Claudia Felser and Wen Hui Duan},
  year={2014}
}
Based on first-principles calculations, we predict Bi2TeI, a stoichiometric compound synthesized, to be a weak topological insulator (TI) in layered subvalent bismuth telluroiodides. Within a bulk energy gap of 80 meV, two Dirac-cone-like topological surface states exist on the side surface perpendicular to BiTeI layer plane. These Dirac cones are relatively isotropic due to the strong inter-layer coupling, distinguished from those of previously reported weak TI candidates. Moreover, with… CONTINUE READING

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