Fig. 1: Electronic properties of BTG.
From: Gate-tunable anomalous Hall effect in Bernal tetralayer graphene
a Schematic of a BTG Hall bar heterostructure and measurement setup. Inset shows the BTG crystal structure where white and blue balls indicate A and B sites of the carbon atoms. b Energy spectrum and corresponding density of states (DOS) of BTG at finite interlayer potential difference \(\Delta\)=30 meV. Here, Auc is the area of the unit cell. Color bar indicates the orbital magnetic moment which is concentrated around the band bottom; peaks in density of states correspond to van Hove singularities (vHs). The band structure was plotted using an 8-band model for BTG with unequal layer potential drop; an equal potential drop 8-band model for BTG, as well as a discussion of the magnetic moment is also described in the Supplementary Information. c Four-terminal resistance Rxx as function of carrier density and displacement field. The cross symbols (‘X’) correspond to the (n, D) conditions in Fig. 3e.
