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A close-up on the discontinuities reveal another detail: at the current where the Hall voltage makes a negative jump the bias point of the I-Vx curve jumps to a lower current. Figure 17 shows a close-up of the I-Vx and I-Vy curves at B=1.48 mT. Note that, in contrast with figure 15, at this field the Hall voltage jumps negative first and then positive. In figure 15 the first jump was positive and the second negative. A positive jump in Vy is always associated with a positive jump in Vx. A negative jump in Vy is associated with a jump in the bias point to lower current. If you look closely at figure 15 you will see the small jump, but this time at a higher current than the large one. Generally on the left side of the R0 peaks the first jump in Vy is positive, but on the right side, at higher fields, the first jump is negative.
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