Landau diamagnetism and Weyl-fermion excitations in TaAs revealed by As75 NMR and NQR

  title={Landau diamagnetism and Weyl-fermion excitations in TaAs revealed by 
 NMR and NQR},
  author={Cheng Wang and Y. Honjo and L. X. Zhao and G. F. Chen and Kazuaki Matano and Rui Zhou and Guo-qing Zheng},
  journal={Physical Review B},
The electronic and superconducting properties associated with the topologically nontrivial bands in Weyl semimetals have recently attracted much attention. We report the microscopic properties of the type-I Weyl semimetal TaAs measured by $^{75}\mathrm{As}$ nuclear magnetic (quadrupole) resonance under zero and elevated magnetic fields over a wide temperature range up to 500 K. The magnetic susceptibility measured by the Knight shift $K$ is found to be negative at low magnetic fields and has a… Expand
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