Extended Data Fig. 1: Transport and Chern numbers.

a, Numerical derivative of \({R}_{xx}\) shown in Fig. 1c, \(d{R}_{xx}/d{B}_{a}.\) Here the Dirac LLs are readily discerned. The yellow circle marks the crossing of the \({N}_{D}=1\) Dirac LL with the top of the FB. b,\(\,{R}_{yx}\) reproduced from Fig. 1d. c, \({R}_{xx}\) (right axis) and \({R}_{yx}\) (left axis) vs. \(\nu\) at \({B}_{a}=\) 3.2 T along the dashed lines in (b). Quantized \({R}_{yx}\) values are indicated with their Chern numbers that match the accompanying slopes of the \({R}_{xx}\) minima in Fig. 1c.