Figure 2: STM differential conductance versus bias-voltage spectra on SLG/PCCO/STO at 4.2 K.

(a–c) Typical proximity-induced V-shaped gaps (a), ZBCPs (b) and split ZBCPs (c). Different colours in a–c are used to distinguish between spectra recorded in different sample areas. Insets in a–c show the typical topography of a sample area where the corresponding spectra in a–c are obtained (the scale bars in the insets have a length of 0.5 nm).