Figure 2
From: Spatial inhomogeneity and temporal dynamics of a 2D electron gas in interaction with a 2D adatom gas
(a) Surface work function change with respect to the \(\sqrt{3}\)-Ag surface as a function of the Ag-2DAG concentration in the temperature range 210–470 K. The lines are data linear fits. Data from the literature are reported in green symbols (refs 8 and 16). The blue symbols show the work function change obtained in the inhomogeneous regime [see the insets in Fig. 3(b,d)]. The inset is a \(\sqrt{21}\)-Ag electron diffraction pattern. (b) Red curve: intensity real-time monitoring of the \(\sqrt{21}\)-Ag electron diffraction pattern upon Ag deposition at 228 K (ε = 16.4 eV). Blue curve: real-time monitoring of the Ag-2DAG concentration upon deposition at 210 K. The black line is a fit showing the linear dependence of the diffracted intensity of the \(\sqrt{21}\)-Ag reconstruction with respect to the Ag deposition.
(a) Mirror Electron Microscopy image of a \(\sqrt{3}\)-Ag surface during a 2DAG-Ag deposition at 220 K after the nucleation of 3D island (white intensity) showing intensity inhomogeneities (ε = 0 eV). (b) 2D map of the surface work function change with respect to the \(\sqrt{3}\)-Ag surface obtained by reflectivity measurements (see Methods). The inset shows the histogram of the work function map. (c) LEEM image (ε = 24 eV) acquired 8 min before Fig. 3(a,b). (d) The 2D map of the Ag-2DAG concentration derived from image (c) (see Methods). The 3D Ag islands have been coloured in red in Fig. 3(d). The inset shows the histogram of the Ag adatom gas concentration. See the text for the arrow meaning. For all images, the scale bar is 2 μm.
