Fig. 2: Temperature- and gate-dependent MR of FGT/Gr heterostructure.

a The MR curves of FGT/Gr heterostructure in Device A as a function of magnetic field at different temperature points. b Variation of MR with temperature under different magnetic fields in Device A. c Transfer curves of FGT/Gr heterostructure in Device C measured at room temperature under different magnetic fields. d Normalized MR of the FGT/Gr heterostructure in Device C under three representative magnetic fields as a function of gate voltage.