In rhombohedral graphene, the displacement field needed to reach the layer-polarized insulator increases with layer count, and six-layer devices show surface-state-dominated transport with gate-selective Landau levels.
In addition, t he gate -tunable surface states in r-6LG provide a platform for designer quantum Hall bilayers, where interlayer backscattering can be electrically switched
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Layer-Number-Controlled Symmetry Breaking and Surface-State Transport in Rhombohedral Graphene Multilayers
In rhombohedral graphene, the displacement field needed to reach the layer-polarized insulator increases with layer count, and six-layer devices show surface-state-dominated transport with gate-selective Landau levels.