Substitution of Ni for Fe in superconducting Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$ depresses the normal-state conductivity but not the magnetic spectral weight

Jinghui Wang, Ruidan Zhong, Shichao Li +12

We have performed systematic resistivity and inelastic neutron scattering measurements on Fe${}_{0.98-z}$Ni${}_z$Te${}_{0.5}$Se${}_{0.5}$ samples to study the impact of Ni substitution on…