Fig. 4: Non-linear transport measurements.
From: Field-induced multiple metal-insulator crossovers of correlated Dirac electrons of perovskite CaIrO3
a The magnetic field dependence of the third-harmonic resistance Rzz3ω. Third-harmonic resistance normalized by linear resistance Rzz3ω/Rzz1ω is also plotted. Here, Rzz1ω = Vzz1ω/I and Rzz3ω = −Vzz3ω/I. The measurements were done under the condition of I = 75 uA and f = 2317 Hz to avoid the heating effects. The inset shows the current dependence of linear and third-harmonic voltage at a frequency of 2317 Hz at 2 K and 14 T. b The contour plot of resistivity as a function of temperature and magnetic field in the longitudinal configuration (B||I||a). The inset shows schematic illustrations of the disordered density wave phase and quasi-1D metal phase.
