Figure 3.

Comparison of experimental STM and STHM images (a, c) with a simulated STM image (b) of the K₄PTCDA phase. The elongated features in STM mode originate from the PTCDA molecules. In the STHM mode, all K atoms are visible as sharp spots, while the bright blurred feature from the simulated and experimental STM (highlighted by the outermost dotted circle) remains visible as a “ghost feature” (highlighted by the innermost dotted circle); see the text for details. The unit cell of the adsorbate layer (blue boxes) comprising the structural model is superimposed in a semitransparent manner. The nonequivalent potassium positions K_A and K_B are marked. Explanations of the displayed quantities are identical to those in Figure 2.