Figure 3
Energy-resolution measurements and valence-band mapping at hν = 5.977 keV for the prototypical example W(110) at 30 K. (a) Fermi-edge cutoff spectra for the monochromator crystals Si(333) and Si(311). (b) Survey overview (kx–ky section) and summed detail patterns of the regions around the high-symmetry points N (b′) and Γ (b′′). (c)–(f) EB-versus-k sections through high-symmetry points reveal a strongly improved signal-to-noise ratio in the sections through five summed N- (d) and Γ-point regions (f) in comparison to sections through a single N- (c) and Γ-point (e). (g)–(l) kx–ky sections taken in the rectangular area marked in (b) at binding energies 1–7 as denoted in (c). The k-scales are quantified by the scale bars in (b), (f) and (k). |