Realization of Weyl semimetal phase in a non-centrosymmetric superlattice in Kane-Mele model

Jiseon Shin, Gun Sang Jeon

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate a superlattice alternately composed of quantum spin Hall insulators in Kane - Mele model and two-dimensional normal insulators due to the staggered lattice potential. The staggered lattice potential in normal insulators as a spacer layer has a role of breaking an inversion symmetry in current study. We show a realization of Weyl semimetal (WSM) phase in a finite region and a phase transition to a weak topological insulator. We estimate Z2 topological invariants by means of Wannier charge center method which is practical for non-centrosymmetric topological insulators. We also discuss Fermi arcs and chiral charges of WSM phase in surface Brillouin zone.

Original languageEnglish
Article number255502
JournalJournal of Physics Condensed Matter
Volume31
Issue number25
DOIs
StatePublished - 2019

Keywords

  • Superlattice
  • Wannier charge center
  • Weyl semimetal
  • Z topological insulator

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