Normal-State Hourglass Dispersion of the Spin Excitations in FeSe${}_x$Te${}_{1-x}$

Shiliang Li, Chenglin Zhang, Meng Wang +8

We use cold neutron spectroscopy to study the low-energy spin excitations of superconducting (SC) FeSe${}_{0.4}$Te${}_{0.6}$ and essentially non-superconducting (NSC) FeSe${}_{0.45}$Te$_…