Fig. 2: Longitudinal and transverse thermoelectric coefficients as a function of the magnetic field at different temperatures.
From: Observation of a thermoelectric Hall plateau in the extreme quantum limit

a Sxx at T ≤ 90 K, where the sign of Sxx is negative at B = 0, and b Sxx at T > 90 K, where the sign is positive at B = 0. c, d show Sxy at T ≤ 90 K and T > 90 K, respectively.