Fig. 1: Eightfold fermions and fourfold VHS in nonsymmorphic TaCo2Te2 with negligible magnetic order. | npj Quantum Materials

Fig. 1: Eightfold fermions and fourfold VHS in nonsymmorphic TaCo2Te2 with negligible magnetic order.

From: Realization of practical eightfold fermions and fourfold van Hove singularity in TaCo2Te2

Fig. 1: Eightfold fermions and fourfold VHS in nonsymmorphic TaCo2Te2 with negligible magnetic order.

a Crystal structure of TaCo2Te2. b Three-dimensional BZ of TaCo2Te2. c Single-crystal X-ray diffraction (XRD) result taken at \(300\,{\rm{K}}\). d Zero-field-cooled (ZFC) and field-cooled (FC) magnetic susceptibility (\(\chi\)) vs. temperature (\(T\)) for magnetic field \(H=0.2\,{\rm{T}}\) parallel to the c axis. Inset: Field-dependent magnetization (\(M\)) at 1.8 K. e, f DFT calculated dispersions along the high-symmetry path without considering SOC (e) and with SOC (f).

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