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. 2014 Dec 5;5:5742. doi: 10.1038/ncomms6742

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(a) Resistance of a folded sample in the vicinity of the main Landau fan (indicated by the black lines) measured over the folding edge. Whereas at positive gate voltages features of the satellite fan can be seen (white lines), an additional peak at V_bg=−25 V can be identified, which is independent of magnetic field. (b) Resistance at B=0 T. The charge neutrality point of the TBG sample (circle) and the additional edge-related peak (arrow) can be distinguished.