Spin mediated unconventional superconductivity exhibits a sign changing order parameter which is often inferred from the observation of a spin resonance mode. Here, the authors demonstrate that the origin of the spin resonance mode for a heavy fermion superconductor may not lie, as previously thought, in the spin-excitonic bound state and therefore its relation to the ordering parameter needs to be reconsidered.
- Yu Song
- Weiyi Wang
- Pengcheng Dai
