Fig. 2
From: Mixed topological semimetals driven by orbital complexity in two-dimensional ferromagnets
Model of a mixed topological semimetal. a Band structure for θ = 45°, showing the lowest four energy bands of the p-model on the buckled honeycomb lattice. Bold numbers refer to the individual Chern numbers of the bands, and colors encode the states’ polarization in terms of px − ipy (blue) and px + ipy (red) orbital character. b Honeycomb lattice of the model. (c) Distribution of the Berry curvature \({\mathrm{\Omega }}_{xy}^{\mathbf{kk}}\) in momentum space close to the emergent nodal point for θ = 60°. The in-plane direction of the full Berry curvature field Ω is indicated by unit arrows that refer to the mixed curvatures \(- {\mathrm{\Omega }}_{yy}^{\widehat {\mathbf{m}}{\mathbf{k}}}\) and \({\mathrm{\Omega }}_{yx}^{\widehat {\mathbf{m}}{\mathbf{k}}}\). d–f Evolution with respect to the magnetization direction θ of d the valence band top and conduction band bottom, e the total orbital magnetization mz, and f the orbital Edelstein response αij using kBT = 25 meV in the Fermi distribution, with the Fermi level set to the energy of the band crossing. In panel d, the Chern number \({\cal{C}}\) of the occupied states is bold, and colors denote the orbital polarization as in a
