Three-dimensional Critical Dirac semimetal in KMgBi

Congcong Le; Shengshan Qin; Xianxin Wu; Xia Dai; Peiyuan Fu; Jiangping Hu

doi:10.1103/PhysRevB.96.115121

Three-dimensional Critical Dirac semimetal in KMgBi

Superconductivity 2017-09-20 v2

Authors: Congcong Le , Shengshan Qin , Xianxin Wu , Xia Dai , Peiyuan Fu , Jiangping Hu

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Abstract

We predicted that AMgBi (A=K,Rb Cs), which have the same lattice structures as the 111 family of iron-based superconductors (Na/LiFeAs), are symmetry-protected Dirac semimetals located near the boundary of type-I and type-II Dirac semimetal phases. Doping Rb or Cs into KMgBi can drive the transition between the two phases. The materials can also be turned into Weyl semimetals and topological insulators by explicitly or spontaneously breaking time-reversal symmetry and C $_4$ lattice symmetry respectively.

Keywords

dirac cones and topological phases electronic structure of materials

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@article{arxiv.1606.05042,
  title  = {Three-dimensional Critical Dirac semimetal in KMgBi},
  author = {Congcong Le and Shengshan Qin and Xianxin Wu and Xia Dai and Peiyuan Fu and Jiangping Hu},
  journal= {arXiv preprint arXiv:1606.05042},
  year   = {2017}
}

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5 pages, 4 figures

Three-dimensional Critical Dirac semimetal in KMgBi

Abstract

Keywords

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