Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe${}_4$As${}_4$

K. Iida, Y. Nagai, S. Ishida +14

Magnetic excitations and magnetic structure of EuRbFe${}_4$As${}_4$ were investigated by inelastic neutron scattering (INS), neutron diffraction, and random phase approximation (RPA) c…