It is known that the spin-excitation spectrum of the undoped parents of iron-pnictide superconductors contains a pronounced magnon peak, but it is unclear whether this survives doping into the superconducting state. Schmitt et al.report resonant inelastic X-ray scattering spectra that suggest it does.
- Ke-Jin Zhou
- Yao-Bo Huang
- Thorsten Schmitt