Figure 3
From: Experimental observation of drumhead surface states in SrAs3

Observation of nodal-loop state in SrAs3. (a) Fermi surface map at a photon energy of 100 eV. (b) Photon energy dependent dispersion maps along the cut 1 direction. (c) Dispersion map measured at 100 eV photon energy. (d) Dispersion map with guide to the eyes. The red dotted arc shows the drumhead surface state. (e) Dispersion map along the center of the electron like pocket. Experimental data (a,c,e) were taken at the SLS and (b) and (d) were taken at the ALS beamline 10.0.1 at a temperature around 18 K. The photon energies are marked in the plot.