Fig. 2: XPS spectra of K+ ions on UHV-cleaved mica.
From: Resolving the intrinsic short-range ordering of K+ ions on cleaved muscovite mica
XPS data (black points) and fitted curves (solid lines) of the K 2p core levels (Al Kα, pass energy 20 eV). a, b Spectra taken in normal and 70° grazing emission, respectively. Two sets of K 2p components fit the spectra, assigned to K residing in the bulk (orange) and on the surface (green). The binding energy axes were adjusted to account for charging (see “Methods”).
