Fig. 2: Weyl fermions in paramagnetic and ferromagnetic states.
From: Dichotomy of magnetic effect between Weyl fermions and anomalous Hall effect in PrAlSi
Configuration of the 40 Weyl nodes in paramagnetic state (PM) (a) and the 64 Weyl nodes in ferromagnetic (FM) state (c) in the bulk BZ with considering spin-orbital coupling (SOC). Projection of the Weyl nodes on the (001) surface BZ in PM state (b) and FM state (d). The blue (red) dots denote the Weyl node with chirality −1( + 1), respectively. e Sketch of the Weyl nodes in the red rectangle regions in panel (b) and (d). The DFT calculated band structures through Weyl node 1 and 2 along \({k}_{y}\) direction in PM state (f) and through Weyl node 2–6 along \({k}_{y}\) direction in FM state (h). The measured band spectra in the integrated momentum range from 0.239 \({{{\text{\AA }}}}^{-1}\) to 0.274 \({{{\text{\AA }}}}^{-1}\) at \({k}_{x}\) direction in PM state (g) and FM state (i). The integrated range is shown by red, double headed arrow in panel e. j, k Zoomed-in parts of the measured band spectra in the regions marked by the green rectangle in panel (g) and panel i. Weyl nodes are marked by black circles in j and k. ARPES spectra shown here are measured using photon energy of \(40{eV}\) with linear horizontal polarization.
