Non-Dirac topological surface states in (SnTe)$_{n\geq2}$(Bi$_2$Te$_3$)$_{m=1}$

S. V. Eremeev; T. V. Menshchikova; I. V. Silkin; M. G. Vergniory; P. M. Echenique; E. V. Chulkov

doi:10.1103/PhysRevB.91.245145

Non-Dirac topological surface states in (SnTe)$_{n\geq2}$(Bi$_2$Te$_3$)$_{m=1}$

Materials Science 2018-09-28 v1

Authors: S. V. Eremeev , T. V. Menshchikova , I. V. Silkin , M. G. Vergniory , P. M. Echenique , E. V. Chulkov

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Abstract

A new type of topological spin-helical surface states was discovered in layered van der Waals bonded (SnTe) $_{n=2,3}$ (Bi $_2$ Te $_3$ ) $_{m=1}$ compounds which comprise two covalently bonded band inverted subsystems, SnTe and Bi $_2$ Te $_3$ , within a building block. This novel topological states demonstrate non-Dirac dispersion within the band gap. The dispersion of the surface state has two linear sections of different slope with shoulder feature between them. Such a dispersion of the topological surface state enables effective switch of the velocity of topological carriers by means of applying an external electric field.

Keywords

topological surface states non-Dirac dispersion spin-helical states van der Waals compounds (SnTe)$_{n}$(Bi$_2$Te$_3$)$_{m}$ band inversion external electric field topological carriers

Cite

@article{arxiv.1505.07616,
  title  = {Non-Dirac topological surface states in (SnTe)$_{n\geq2}$(Bi$_2$Te$_3$)$_{m=1}$},
  author = {S. V. Eremeev and T. V. Menshchikova and I. V. Silkin and M. G. Vergniory and P. M. Echenique and E. V. Chulkov},
  journal= {arXiv preprint arXiv:1505.07616},
  year   = {2018}
}

Non-Dirac topological surface states in (SnTe)$_{n\geq2}$(Bi$_2$Te$_3$)$_{m=1}$

Abstract

Keywords

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