Fig. 6: Average spin splitting δE(k) (meV) over occupied bands, for \({{\rm{AA}}}^{{\prime} }\)-stacked MnPS3 bilayers in the antiparallel (↑↓/↓↑) ordering with magnetic space group Cm, shown in the 2D Brillouin zone.
From: Engineering altermagnetism via layer shifts and spin order in bilayer MnPS3
From left to right: lateral displacements (0, 1/3), (1/3, 1/3), and (1/3, 0). Dashed lines mark the hexagonal zone boundary; high-symmetry points are labeled. Positive (blue) values correspond to E↑ > E↓, negative (red) to E↓ > E↑, so the sign encodes the direction of spin polarization. The orientation and selection of nonzero splitting reflect the mirror symmetries preserved in each stacking configuration.
