Figure 3.
Angular dependence of the nonlinear Hall effect in Td-TaIrTe4. (a) Electrode geometry for angle-dependent measurements. The driving field is applied between two opposite electrodes, and the voltage drop is measured between the other two opposite electrodes at the transverse direction. By rotating the measurement framework in a clockwise direction as shown by the red arrow, signals of different lattice directions are recorded. (b) First-harmonic I-V curves for different directions in TaIrTe4. (c) The upper panel is 
as a function of 
, the black dots are experimental data and the line is fitted to the experimental data. The lower panel is the 
as a function of 
, the black dots are experimental data and the red line is the spline of each experimental data set. (d) 
depends nonlinearly on the first-harmonic 
for different directions. (e) 
depends linearly on the cubic of the first-harmonic 
for different directions. All the tests are implemented at 100 K.