Fig. 2: Identification of correlated insulating states at different fillings.

a PL peak position (red) extracted from Fig. 1c as a function of the gate voltage, correlated with MIM measurements of the local conductivity (blue) taken at 14 K. Dashed lines are fillings corresponding to the insulating states determined from the MIM measurements. b Zoom-in of the traces from −0.2 V to 3.2 V in a.