Extended Data Fig. 6: The electric-field span of the Chern state as a function of magnetic field.
From: Realization of the Haldane Chern insulator in a moiré lattice
a, \({R}_{{\rm{xy}}}\) and \({R}_{{\rm{xx}}}\) of Device 2 at \(\nu =2\) and T = 10 mK (lattice temperature) as a function of electric field. The data are extracted from Extended Data Fig. 4. b, The electric-field span, \(\Delta E\), of the Chern state as a function of magnetic field. For each magnetic field, the electric-field dependence of \({R}_{{\rm{xy}}}\) is fit with a Gaussian function and \(\Delta E\) is determined as half of the variance. The error bars are one-sigma uncertainty of \(\Delta E\) in the Gaussian function fitting. The red dashed line is the best fit to \(\Delta E=\sqrt{{a}^{2}+{({bB})}^{2}}\) with fitting parameters a = 2.2 ± 0.1 mV/nm and b = 2.0 ± 0.1 mV/nmT.
