Fig. 6: A comparison of the experimental Kelvin probe map of the graphene broken-symmetry edge states with different ground-state symmetries.

a Kelvin probe map at \(B=10\,\text{T}\) of the chemical potential as a function of Y-position across the QH boundary from Fig. 5b. b–f (top panels) Schematic dispersion of the four single-particle energy levels ε±± for different phases obtained from the analytic formulas in Table 1 of ref. ²⁹. (bottom panels) Simulation of the Kelvin probe maps of the chemical potential vs. local gate and Y-position using the dispersions of the various ground-state symmetries in the top panels along with the measured gate response profile in the G1-Y plane obtained at \(B=0\,\text{T}\), as shown in Fig. 1c.