Intertwined dipolar and multipolar order in the triangular-lattice magnet TmMgGaO4

Abstract

Classically ordered phases normally coupled directly to external probes but exotic multipolar phases are not straightforwardly accessible. Here the authors show that TmMgGaO4 has multipolar order that can be inferred by inelastic neutron scattering and modeled by transverse field Ising model.