Fig. 4: WPs and Fermi arcs in CrSb.
a Calculated total spectral density along \(\overline{\rm{M}}_1-\overline{\Gamma }-\overline{\rm{M}}_2\) for a Sb terminated CrSb (0001) surface, b surface electronic structure as in (a) but with the bulk spectral weight subtracted. The WPs and their chirality are marked by red (χ = 1) and green (χ = −1) dots. Loops as they are defined in the surface BZ, overlaid with Fermi surface maps at a photon energy of 102 eV (c) and 107 eV (d) on Sb (c) and Cr (d) terminated surfaces. The photon energy dependent EDC second derivative spectra on a Sb terminated surface for photon energies of 77 eV (e), 82 eV (f), 85 eV (g), 93 eV (h) under LH polarization along \(\overline{\rm{M}}_1-\overline{\Gamma }-\overline{\rm{M}}_2\), with corresponding DFT calculations overlaid. The pink lines mark the bulk states. The green (yellow) and orange (cyan) lines in (c, d) indicate the surface Fermi arcs (SFAs) of the Sb (Cr) terminated surfaces along the \(\overline{\Gamma }-\overline{\rm{M}}\) and \(\overline{\Gamma }-\overline{\rm{K}}\) directions, respectively. The green, blue, and red lines and arrows in (b, e–h) mark the SFAs. Chiral charge analysis for the experimental (i, k) and calculated (j, l) spectral density along the loops around the surface projected WP momentum.
