Fig. 2
From: Non-trivial surface states of samarium hexaboride at the (111) surface
Fermi contour obtained by ARPES. The ARPES data were taken with circularly polarised photons (hν = 35 eV) at 15 K. The ARPES intensities from left- and right-handed polarisations are summed up to show all the states without any influence of circular dichroism. The photon incident plane is slightly shifted from (11\(\bar 2\)) because of small misalignment and angle sweep performed for the ARPES scan. This shift is smaller than 15°. a Fermi contour with an energy window of 10 meV. b Symmetrised Fermi contour based on the three-fold rotation symmetry and time-reversal symmetry. A thick (blue) hexagon is the SBZ boundary of the (1 × 1) surface unit cell
