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Fig. 2. (Color online) (a) Electronic band structure and (b) Brillouin zone of Si2Bi2. In (b), irreducible Brillouin zone is marked by red and blue shades. The k-point paths for drawing the band structure are taken from the red zone. (c) Energy band dispersion zoomed in just below the Fermi level along A-Γ line. The four-fold degenerate Dirac point is topologically protected by the C3 rotational symmetry.
New Phys.: Sae Mulli 2021;71:218~224