Ferromagnetic inter-layer coupling in FeSe${}_{1-x}$S${}_x$ superconductors revealed by inelastic neutron scattering

Mingwei Ma, Philippe Bourges, Yvan Sidis +8

FeSe${}_{1-x}$S${}_x$ superconductors are commonly considered layered van der Waals materials with negligible inter-layer coupling. Here, using inelastic neutron scattering to study…