Supplemental Material

Figure S1. Magnetic configurations of the Fe3GaTe2 and MnBi2Te4 monolayers; Figure S2. Relative energy of different stacking types; Figure S3. Spin- and atom-resolved energy bands of Fe3GaTe2/h-BN/MnBi2Te4 at the AFM state; Figure S4. Schematic of virtual hopping along eg-p...p-a1 channel between d orbitals of Fe and Mn; Figure S5. k||-resolved DOS of the Gr electrode for the device of Gr/Fe3GaTe2/h-BN/MnBi2Te4/Gr with different biaxial strain.