Fig. 2

Interlayer magnetotransport properties of YbMnBi₂. a Schematic of the interlayer tunneling of the zeroth LLs’ Weyl fermions. b The field dependence of the out-of-plane resistivity, ρ _zz (B), under different field orientations at T = 2 K. The inset shows the experimental setup. The solid lines superimposed on the data represent the fits to Eq. (2) in the text. The fit for θ = 90° is not available since the zeroth LLs disappear for in-plane field. c Angular dependence of magnetoresistance (AMR), measured under different fields up to 31 T and at T = 2 K. The black curves superimposed on the data represent the fits to Eq. (2) in the text. At low fields (e.g., 0.1 T), AMR shows the sin² θ dependence expected for the Lorentz effect as shown in the inset, indicating that the interlayer transport at low fields is dominated by the Dirac band transport as discussed in the text