Figure 5
Dirac cone anisotropy in SrMnBi2 and CaMnBi2.
(a) and (b) show locus of the crossing points in the momentum space in SrMnBi2 (blue empty circles) and CaMnBi2 (red empty triangles), respectively. (c). Measured lower Dirac band dispersion along the Γ-M direction (thick black line) and momentum dependence of the crossing point energy (empty blue circles, the dashed blue line is a guide to the eyes) along the underlying locus shown in (a)(red thick line) for SrMnBi2. The corresponding calculated Dirac band along the Γ-M direction (red dashed line) and the cross point energy along the underlying locus (solid yellow line) are also plotted for comparison. (d). Measured lower Dirac band dispersion along the Γ-M direction (thick black line) and momentum dependence of the lower-band-top energy (empty blue squares, the dashed blue line ia a guide to the eyes) and the upper-band-bottom (solid blue squares) along the underlying locus shown in (b)(blue thick line) for CaMnBi2. The corresponding calculated Dirac band along the Γ-M direction (red dashed line) and the cross point energy along the underlying locus (solid yellow line) are also plotted for comparison.
