Neutron Spin Resonance in the Heavily Hole-doped KFe${}_2$As${}_2$ Superconductor

Shoudong Shen, Xiaowen Zhang, Hongliang Wo +6

We report high-resolution neutron scattering measurements of the low energy spin fluctuations of KFe${}_2$As${}_2$, the end member of the hole-doped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ fam…