Magnetic frustration and quantum fluctuation in rare-earth triangular-lattice magnets

Rare-earth triangular-lattice magnets have received extensive attention in recent years. This class of materials in general exhibits strong spin-orbit coupling effects, anisotropic magnetic interactions, and complex crystal field structures, which may result in novel quantum states including quantum spin liquids, intrinsic quantum Ising magnets, and hidden order. Here, we present a brief review of the neutron scattering studies of the magnetic correlations and quantum fluctuations in rare-earth triangular-lattice magnets.