Fig. 2: Nonreciprocal transport under in-plane magnetic field.

a Schematic illustration of the measurement configuration. b, c Magnetic field dependence of R^ω (b) and R^2ω (c) at various temperatures. d Color plot of γ as a function of magnetic field and temperature. γ is derived using the relation \(R^{2\omega } = \frac{1}{{\sqrt 2 }}\gamma R^\omega BI_0\). Gray lines, respectively, show the curves with equal resistance of R^ω = 1 and 120 Ω. e Temperature dependence of nonreciprocal coefficient γ at B = 0.02 T and I₀ = 10 μA (black). The theoretical curve with the formula \(\gamma = \gamma _0(T - T_{{{{\mathrm{BKT}}}}})^{ - 3/2}\) (green) is also plotted, where γ₀ = 380 T⁻¹ A⁻¹ K^1.5.