Fig. 2: Transport properties of WTe₂/Fe₃GeTe₂ heterostructures.

a Microscopic image of sample A (1L WTe₂/4L Fe₃GeTe₂). Scale bar: 10 μm. b Increasing longitudinal resistivity when temperature goes down for sample A. c Hall resistivity of the heterostructure shown in (a). Hall resistivity shows a peak and dip near the transition edge before the magnetization saturates, which is a sign of the topological Hall effect. An offset is used for clarity. d Longitudinal resistivity dependence on the temperature, showing the metallic behavior when temperature decreases. Inset shows the microscopic image of sample B (2L WTe₂/30L Fe₃GeTe₂). Scale bar: 10 μm. e Hall resistivity of the heterostructure shown in (d). An offset is used for clarity. Magnetic field is along out-of-plane direction.