Extended Data Fig. 6: Comparison of linear transverse responses in corrugated BLG, simple BLG, and corrugated MLG.
From: Hall effects in artificially corrugated bilayer graphene without breaking time-reversal symmetry
a, The linear transverse resistivity ∣ρyx∣ as a function of the back-gate voltage is measured in the corrugated BLG, simple BLG and corrugated MLG. In comparison with the ∣ρyx∣ in corrugated BLG, the signal is negligibly small for simple BLG and corrugated MLG except near the charge neutrality point. The transverse response near the NP may be due to the charge inhomogeneity because of the electron-hole puddles or the imperfection of the Hall bar that were commonly observed in graphene near the charge neutrality point55,56, and is not the major focus of this work. In corrugated BLG, uniquely, can be seen over a very wide range of Fermi energy and well explained by the model of pseudo-PHE. b-d, Colourmaps of the transverse resistivity ρyx as a function of Vg and B in the corrugated BLG (b), simple BLG (c) and corrugated MLG (d). In corrugated BLG, interplay between the zero-magnetic-field pseudo-PHE and the classical Hall effect can be clearly seen, exhibiting an anti-crossing structure in the colourmap. In contrast, for the simple BLG and corrugated MLG, a standard colour plot of the Hall effect in graphene with four quadrants crossing at zero magnetic field and the neutrality point is shown.
