Fig. 3: Band dispersions of CrSb.
The photon energy dependent ARPES spectra along \(\widetilde{\rm{M}}-\widetilde{\Gamma }-\widetilde{\rm{M}}\) measured with photon energies of 102 eV (a, d), 107 eV (b, e), and 112 eV (c, f) on Sb (a–c) and Cr (d–f) terminated surfaces, with corresponding DFT bulk calculations (pink) overlaid. The green and yellow lines indicate the surface states of the Sb and Cr terminated surfaces along \(\overline{\Gamma }-\overline{\rm{M}}\) directions, respectively, and are inserted as a guide to the eye. The calculated spin dichroism spectra with SOC along the \(\widetilde{\rm{M}}-\widetilde{\Gamma }-\widetilde{\rm{M}}\) direction at kz = 0.8 π/c (g), 0.6 π/c (h), and 0.4 π/c (i) planes. The spectra are plotted using a two-dimensional color scale, with saturation representing the spectral intensity ρ(E, k) and red/blue color corresponding to the dichroism \(({\rho }_{\uparrow }-{\rho }_{\downarrow })/({\rho }_{\uparrow }+{\rho }_{\downarrow })\) where spin is projected onto the z axis. Spin-polarized EDCs along the left (j) and right (k) cut lines indicated in (d). The spin-polarized EDCs were measured with a photon energy of 102 eV, while the red (blue) curve corresponds to spin-up (spin-down). The EDC intensities are already normalized in the non-spin polarized region. In order to obtain sufficient spin statistics, more than 30 h were accumulated in total. l The normalized spin-polarized intensity difference between spin-up and spin-down, with the red (blue) colors indicating spin-up (spin-down) polarization for the left (right) bands.
