Extended Data Fig. 6: Variation in individual spectra at the domain wall.
From: Interacting multi-channel topological boundary modes in a quantum Hall valley system
a, Individual spectra (blue, green, brown, purple, black, red) measured for \(\widetilde{\nu }=2\) (a) and \(\widetilde{\nu }=1\) (b), at domain-wall positions corresponding to line 1 to line 6 (Extended Data Fig. 5). All spectra in a show a charge gap Δcharge that is smaller than the exchange gap far from the domain wall (grey dashed spectrum). No Landau level splitting is visible at the \(\widetilde{\nu }=1\) domain wall (b), in contrast to the behaviour in a and far from the domain wall (grey dashed spectrum).
