Extended Data Fig. 3: Berry curvature on the Fermi surface.
From: Symmetry-enforced topological nodal planes at the Fermi surface of a chiral magnet
a, Berry curvature Ωμ(k) on one of the Fermi surfaces of a tight-binding model in SG 19.27, corresponding to ferromagnetic MnSi with the magnetization pointing along [010]. a1 shows the three components of Ωμ as a function of kx, along the direction indicated by the green arrow in a2. The absolute value of the Berry curvature |Ω(k)| is indicated in a2 by a logarithmic colour code. b, Same as a but for a tight-binding model in SG 4.9, corresponding to ferromagnetic MnSi with the magnetization rotated into the x–y plane.
