Figure 6
The Dirac cone structure in SrMnBi2 and CaMnBi2 from the band structure calculations.
(a). Calculated Band structure of SrMnBi2 along high symmetry directions considering the spin-orbital coupling and the checkboard-type antiferromagnetic order. Red circle and blue circle highlight the Dirac band features along Γ-M and near X, respectively. (b). Constant energy contours of SrMnBi2 band structure at different energies. (c). Schematic band structure for SrMnBi2 of the upper Dirac band (blue) and lower Dirac band (red) in one Brillouin zone quadrant. (d). Calculated Band structure of CaMnBi2 along high symmetry directions considering the spin-orbital coupling and the checkboard-type antiferromagnetic order. Red circle and blue circle highlight the Dirac band features along Γ-M and near X, respectively. (b). Constant energy contours of CaMnBi2 band structure at different energies. (c). Schematic band structure for CaMnBi2 of the upper Dirac band (blue) and lower Dirac band (red) in one Brillouin zone quadrant.
