Fig. 2: Observation of practical eightfold fermions in TaCo2Te2.
From: Realization of practical eightfold fermions and fourfold van Hove singularity in TaCo2Te2
a Integrated photoemission intensity maps in the \({k}_{x}-{k}_{z}\) plane taken at \({E}_{B}=\) 0.13 \({\rm{eV}}\) measured by varying photon energy. b, c Fermi surface in the \({k}_{x}-{k}_{y}\) plane measured with photon energies \(24\,{\rm{eV}}\) and \(90\,{\rm{eV}}\), respectively. d Fermi surface calculated by DFT with projection to the \({k}_{x}-{k}_{y}\) plane. e The band dispersion along the \({k}_{z}\) direction at \({k}_{x}=0.67\,{\text{\AA}}^{-1}\) as shown in (a) Cut1. f–i ARPES measured spectra (second derivative plot) and corresponding DFT calculated dispersions along high-symmetry paths with SOC.
