Surface Fermi arcs in $Z_2$ Weyl semimetals $A_3 Bi$ (A=Na, K, Rb)

  title={Surface Fermi arcs in \$Z\_2\$ Weyl semimetals \$A\_3 Bi\$ (A=Na, K, Rb)},
  author={Eduard V. Gorbar and Vladimir A. Miransky and Igor A. Shovkovy and Pavlo O. Sukhachov},
  journal={Physical Review B},
The surface Fermi arc states in $Z_2$ Weyl semimetals $A_3 Bi$ (A=Na, K, Rb) are studied by employing a continuum low-energy effective model. It is shown that the surface Fermi arc states can be classified with respect to the ud-parity symmetry. Because of the symmetry, the arcs come in mirror symmetric pairs. The effects of symmetry breaking terms on the structure of the Fermi arcs are also studied. Among other results, we find at least two qualitatively different types of the surface Fermi… 

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