Fig. 2: Sharp and parabolic cutoff on the slow side.
From: Work function seen with sub-meV precision through laser photoemission
a–d Photoelectron distributions detected with fibre-laser angle-resolved photoemission spectroscopy. The sample was rotated from R = 0 (a) to 7.5° (d), where R is the rotation angle. The distributions are mapped in the plane spanned by the photoelectron energy (EPE − EF) and emission angle (θ), where EPE and EF are the photoelectron energy level and Fermi level, respectively. e Energy distribution curves (EDCs) and cutoff functions (CFs) around the cutoff acquired in the R = 0° configuration. Cutoff energy (f) and width (g) of the CFs as functions of θ. The inset to f shows the cutoff energy around θ = 0°, with the bar indicating 5.5034 ± 0.0012 eV for the values in [−0.5, 0.5°]. The bar in g indicates 10.8 ± 3.4 meV for the values in [−7.5, 15°].
