Extended Data Fig. 1: Comparison of single dI/dV spectra obtained at VTG = 0 and VTG = 0.53 V.
a, VTG = 0. b, VTG = 0.53 V. In a we display dI/dV spectra obtained when the graphene doping is near the CNP. A strong spectral change is observed when the graphene transitions from hole-doped to electron-doped. The Dirac point positions are denoted by vertical arrows. In b we display typical dI/dV spectra at n = 1/3, 1/2, 2/3 and 1 for correlated states (red) as well as for three other filling factors that lack correlated states (black). In each panel the dI/dV spectra are shifted vertically for clarity. The spectra indicate that the graphene sensing layer is more electron doped when the moiré heterostructure is in a correlated insulator state.
