Fig. 4: Bias-dependent STM.
From: Double-pentagon silicon chains in a quasi-1D Si/Ag(001) surface alloy
Comparison between simulated (light colour) and experimental (dark colour) 2.6 × 2.6 nm2 STM images of the (3 × 3) reconstruction as a function of applied bias. Left columns: empty state (positive sample bias) images. Right columns: filled state (negative sample bias) images. Experimental images collected at 80 K with tunnelling current I = 20 nA. Solid squares highlight the (3 × 3) unit cell. The SA-DPC model is shown in the centre column and partially overlays the computed images.
