Fig. 2: Temperature dependence of the nonlinear Hall effect.
From: Giant Berry curvature dipole density in a ferroelectric Weyl semimetal
a–d Temperature-dependent 2ω signals in longitudinal and transverse configurations, respectively. Inset shows the contact layout and definition of crystal axes. The nonlinear Hall signal is proportional to the square of excitation current as indicated by shadowed fitting lines, while the longitudinal signals are almost unchanged as indicated by the blue-shadowed lines for eye-guide. The error bars represent the standard deviation of the measured data.
