Fig. 1: Angle-resolved photoemission spectroscopy (ARPES) measurements of ZrSiS.
From: Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS
a Schematic view of pump-probe ARPES set-up. The photon energies of the pump and probe pulse are 1.2 and 21.8 eV, respectively. b Tetragonal crystal structure of ZrSiS. c Measured Fermi surface map of ZrSiS using a photon energy of 30 eV. It consists of two diamond shaped pockets formed by the crossing of the bulk valence and conduction bands and an additional pocket at the X point formed by the surface state. d Fermi surface (leftmost panel) and constant energy contours at various binding energies as noted on top of the contours. The measurements in panel d were performed in our home-built static ARPES system.
