Figure 4: Topological surface-state dispersions observed by ARPES.
From: Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12
(a,b) ARPES intensity plots along [100] near EF taken with (a) 16.5 and (b) 53.5 eV photons and MCDs at EF (±10 meV). The data is divided by the Fermi distribution function at the sample temperature (20 K for (a) and 14 K for (b)) convolved with the instrumental resolution. Lines are drawn as guides to the eye. (c) Constant EC around EF (±10 meV) taken with 16.5 eV photons at 14 K. (d) ARPES image with 53.5 eV photons measured at room temperature. The ARPES intensity plots are symmetrized with respect to 
(k=0 Å−1) and shown in a colour scale: dark (red, blue, and black for (a), (b), and (c, d) respectively) areas represent high intensity.
