Fig. 1

Schematic electronic band structure and in-plane magnetotransport properties of YbMnBi₂. a Schematic of YbMnBi₂’s Fermi surface determined by ARPES experiments²⁴. The red and blue pockets correspond to electron- and hole-like pockets, respectively. The black dots represent Weyl points. b Schematic of the linear band crossing for the electron- and hole-like pockets and the Weyl point, also determined by ARPES experiments for the cuts 1–3 shown in a ²⁴. c Schematic of Landau levels for three types of band crossings shown in b under high magnetic fields. We adopted the 2D Landau quantization mode because of the quasi-2D electronic structure of YbMnBi₂. d, The normalized in-plane magnetoresistivity MR [= \(\frac{{{\rho _{xx}}({\bf{B}}) - {\rho _{xx}}({\bf{B}} = 0)}}{{{\rho _{xx}}({\bf{B}} = 0)}}\)] as a function of magnetic field along the out-of-plane direction. Inset, the FFT spectra of the SdH oscillations. e The fits of SdH oscillations at 2 and 18 K by the two-band LK formula (see the Methods section for more details for the fits). The SdH oscillatory component ρ _osc is obtained by subtracting the magnetoresistivity background. ρ ₀ is the zero-field resistivity