Figure 3: ARPES intensity plots near EF at different temperatures.
From: Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12

(a–d) ARPES data are divided by the Fermi distribution function at each sample temperature convolved with the instrumental resolution. All data were taken along [110] with hν=16.5 eV. The intensity plots are symmetrized with respect to (k=0 Å−1) and shown in a colour scale: dark blue area represents high intensity. Circle (triangle) markers are the peak positions from ARPES momentum (energy) distribution curves (these curves are shown in Supplementary Fig. 2). The white arrow in (a) indicates a state lying at EF.