Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$

Songxue Chi, Astrid Schneidewind, Jun Zhao +8

We use inelastic neutron scattering to study magnetic excitations of the FeAs-based superconductor BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ above and below its superconducting transition tempe…