Extended Data Fig. 3: V–I characteristics of sample A at zero magnetic field and selected temperatures.
From: Axionic charge-density wave in the Weyl semimetal (TaSe4)2I
a–j, V–I characteristics at 80 K (a), 105 K (b), 130 K (c), 155 K (d), 180 K (e), 205 K (f), 230 K (g), 255 K (h), 280 K (i) and 305 K (j). These data were used to calculate the differential resistance dV/dI curves in Fig. 2d. At temperatures below 180 K, we start to observe nonlinearity. This nonlinearity becomes even more apparent in the dV/dI curves shown in Fig. 2d, where a deviation from the linear behaviour is already seen at 230 K.
