Fig. 3: Phase diagram and scaling of electric field data with different current density J and magnetic field B.
From: Observation of symmetry-forbidden rectification in an inversion-symmetric Weyl metal
a A phase diagram has been constructed in the current density J1ω-magnetic field B plane using rectification measurements. This diagram distinguishes between two regions: region 1 and region 2. While region 1 only shows 3rd harmonic generation, region 2 displays both rectification and 3rd harmonic generation. b The scaling curves of DC electric field \({E}_{xx}^{DC}(J,B)\) data taken at T = 1.7 K are presented. All the curves at different current densities and magnetic fields collapse into a single universal curve. c The enlarged \({E}_{xx}^{DC}\) as a function of J at small J in different magnetic fields at T = 1.7 K. This data shows a clear transition from region 1, where the response is nonlinear with no rectification but has an electrical third harmonic signal, to region 2, where both occur. d The electric field \({E}_{xx}^{DC}\) and \({E}_{xx}^{3\omega }\) as a function of phase θ of the driving current at I = 13 mA shows sinusoidal variation. The phase of the driving current determines the direction of the DC electric field. Sensitivity to initial conditions is a property of a nonlinear system.
