Fig. 2: Conductance spectra across a step-terrace formation.
From: Mottness versus unit-cell doubling as the driver of the insulating state in 1T-TaS2
a A topographic image showing three terraces separated by two steps (V = 250 mV, Iset = 125 pA, scale bar 5 nm). The uppermost terrace at the left-hand-side is further divided into two regions separated by a domain wall, Regions 1 & 2. b Spectroscopy along the path marked by the red-tinted rectangle in a, averaged over the rectangle's short axis (the width of the rectangle was chosen so as to average over, approximately, the vertical projection of one CDW period. The raw conductance curves from which this plot was obtained are shown in Supplementary Note 5). c–f Representative spectra collected in each of the four regions, 1–4, shown in a. Leaving aside the metallic Region 2, the type of spectrum alternates layer-by-layer.
