Figure 4
From: Visualizing Non-abrupt Transition of Quantum Well States at Stepped Silver Surfaces
The energy position of an individual QW (DFT) peak as a function of distance from the step-edge.
Red dots are the positions of the above peak in the surface atom-resolved theoretical electronic density of states. The insets show the step-induced (line defect) electron oscillation (Friedel-type) modified by the effect of Smoluchowski-type charge smoothing. The Bézier-fitted line (dashed) is very similar to the experimental fit [see Fig.2(d)], which indicates that the transition of QW state is nearly smooth with a lateral extension of ~±12 Å. A side-view of the relaxed structure of Ag(4.5 ML)/Cu(111) system is rendered at lower panel.
