Fig. 4: Comparison between NdBi 2q (001) surface states and angle-resolved photo-electron spectroscopy (ARPES).
From: Unconventional surface state pairs in a high-symmetry lattice with anti-ferromagnetic band-folding
a 2D surface Fermi surface (SFS) on 2q (001) labeled with two sets of cuts in black and white dashed lines, and an orange box focusing on the surface state pairs. b SFS zoomed in the orange box of (a) for the surface hole Fermi arc and electron pocket with the spin texture (in-plane components of the expectation value of spin weighted by the SFS) indicated by the orange arrows. The different energies are labeled in eV. c, e Comparison between ARPES and the calculated spectral functions at the cuts (black dashed lines in (a)) of 0.03, 0.08, 0.12, 0.14, 0.18, and 0.20 in the unit of the nonmagnetic surface Brillouin zone. d, f Comparison at cuts in the other direction (white dashed lines in (a)) at 0.03, 0.09, 0.17, 0.22, 0.24, and 0.27. All energies are downward shifted by 0.010 eV from the Fermi energy (EF).
