Extended Data Fig. 10: Quantum oscillations at D = + 0.5 V/nm in device D1 (θ = 1.08°).
From: Electrically tunable correlated and topological states in twisted monolayer–bilayer graphene
Landau fan diagram up to full filling of the moiré unit cell with D = + 0.5 V/nm at T = 300 mK. Separate sequences of quantum oscillations emerge from ν = − 4 with a dominant sequence of νLL = + 4, + 8, + 12, . . . , from ν = 0 with dominant sequences of νLL = − 2, − 6, − 10, . . . and νLL = + 6, + 12, + 18, . . . , and from ν = + 2 with a dominant state at νLL = + 3. Quantum oscillations emerging from ν = + 2 with larger filling factor do not follow a simple sequence, which may be a consequence of structural disorder in the sample. These states are illustrated schematically in the bottom panel with dashed lines. Dotted lines show additional states which emerge at higher field. Gray shaded regions denote band insulators and the orange shaded region denotes the CI state. The apparent 6-fold degeneracy of electron-like quantum oscillations emerging from ν = 0 may indicate the presence of multiple Fermi surface pockets within the moiré Brillouin zone.
