In Fig. 2e of this Article, the curve at −4 mT was missing, and in Fig. 2f, several of the curves were missing. Figure 1 of this Amendment shows the incorrect and corrected panels, for transparency. In Fig. 2g, the tick marks on the x axis of the inset should be labelled 0.0 T, 0.1 T and 0.2 T (not 1 T, 2 T and 3 T). In the ‘Peer review information’ section, the name of reviewer Fan Zhang was inadvertently misspelled ‘Fan Zheng’. These errors have been corrected online.

Fig. 1 This figure shows the incorrect, as-published original Fig. 2e, f and the corrected Fig. 2e, f. Full size image