Fig. 4: Theoretical modelling of field-switchable chiral domains.

a, Field dependence of chiral conductivity Δσ at various angles. Between θ = ±0.3 and ±4.8° all data are measured with an angle step of 0.5°. b, Angular dependence of the first-order derivative ∂(Δσ)/∂B from B = 6 to 18 T. The green curve represents the model description of chiral conductivity: \(\frac{\partial \Delta \sigma }{\partial B}={\rm{sign}}(\theta )\,\cos (\theta )\,\frac{{\Delta }_{0}\,\widetilde{M}{e}^{2}\tau }{2{{\rm{\pi }}}^{3}\hbar }\), as derived in the Methods. c, Sketch of a chirality reversal at in-plane aligned magnetic fields. The emergence of opposite domains can naturally lead to a strong enhancement of eMChA at low field angles.