Fig. 3: Layered Material BaMnSb2.
a Illustration of the Ba-Sb layer, where each dashed circle stands for the projection of two Ba atoms onto the Sb layer and the solid dots are Sb atoms. The solid lines connecting Sb atoms indicate the zig-zag distortion, and the red dashed box marks the unit cell with 1 and 2 labeling the two Sb atoms. b The band structure of the TB model for BaMnSb2 along M − X − M for α = 0.86 (red), α = 1 (orange), and α = 0.7 (blue), respectively, where X is at ky = 0. In c and d, the Z2 index and PET components obtained from the TB model are plotted as a function of α, respectively. In d, the PET components are in the unit eÅ−1, the gray dashed line is at α = 0.86, and the inset is the zoom-in version of the boxed region.
