Terahertz nonlinear optics of chiral semimetals RhSn, HfSn, and PdGa Yuewen Gao, Toshiaki Iitaka and Zhi Li Eur. Phys. J. B, 94 5 (2021) 95 Published online: 03 May 2021 DOI: 10.1140/epjb/s10051-021-00093-z