Extended Data Fig. 9: Device characterization.
From: Tunable spin-polarized correlated states in twisted double bilayer graphene
a, c–g, Device structure, optical image and four-terminal resistivity map of each device: 1.26° (a), 1.32° (c), 1.41° (d), 1.48° (e), 1.53° (f) and 2.00° (g). For the 1.26° device, the active device is the four-terminal Van der Pauw sample. The structure of each device is depicted by the cross-section illustration on the left of the optical image. b, Two-terminal resistance measured in the 1.26° device in the same gate voltage range presented in a. Dashed square marks the active area studied. h, Structure and optical image of the 1.33° device.
