Fig. 2: Electron doping of graphene due to charge transfer from CGT.
From: Two-dimensional ferromagnetism detected by proximity-coupled quantum Hall effect of graphene
a, c Schematic illustration of device type A (D1 and D2) and B (D3–D5), respectively. For type A, 2P (red) and 4P (black) configurations are adopted. For type B, only the 2P configuration is used. b, d Corresponding transfer-characteristic curves of D1 and D3. Inset of (b) shows schematic diagrams for the measurement configuration of R2p (upper) and Rxx (lower), where the upper and lower illustrations are the side and top views, respectively.
