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: $\frac{\partial \mathrm{\Delta }\sigma }{\partial B}=\mathrm{sign}\left(\theta \right)\cos \left(\theta \right)\frac{{\mathrm{\Delta }}_0\tilde{M}{e}^2\tau }{2{\mathrm{\pi }}^3ħ}$, 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.