Figure 1

(a) X-ray diffraction patterns of single layer Bi₂Se₃, CoFe₂O₄ and bilayer (Bi_1-xSb_x)₂Se₃/CFO samples. (b) The RHEED patterns of Bi₂Se₃ which grew on CFO layer. (c) The schematic diagram of bilayer structure, and the inset is Hall bar pattern which observed by optic microscope.