Figure 2.pxp

Spectroscopic dI/dV measurements acquired over the center (red) and two sides

(black and blue) of a ligand of an FePc molecule and over the silicene background (gray); red

and gray spectra are vertically offset for clarity (dotted horizontal red line indicates the actual

zero). The location at which each spectrum is acquired is marked on the image in the inset. At

positive bias the spectra are dominated by the silicene. However, additional spectroscopic

features observed below the Fermi energy on both sides of the ligand for all molecules. The

blue vertical arrow indicates a spectroscopic feature (at ~-0.7 V) that appears only on the

ligands. (Spectra and inset, 2.94 nm x 2.94 nm, Vset = -2 V, Iset = 0.5 nA).