The research performed during the project followed the themes outlined in the original proposal, including experimental exploration of topological magnetic quasiparticles, magnetic excitations in quantum magnets on strongly frustrated lattice geometries, exploration of new structural families of spin-orbit Mott insulators, experimental manifestation of quantum criticality, synthesis of new classes of rare-earth magnets with strong spin-orbit coupling as candidates to display novel correlated quantum behaviour. The main already published results include: direct visualization of the isospin texture of the quantum wavefunction of topological magnetic quasiparticles [reference 11 in the Publications List], experimental identification of a novel mechanism for ground state selection by quantum fluctuations in the strong spin orbit regime [11], new experimental and theoretical results on the role of glide symmetry breaking near quantum phase transitions [8], direct experimental observation of avoided quasiparticle decay due to strong quantum interactions and experimental observation of the complete momentum- and energy-dependent spectrum of coherent quantum fluctuations in a frustrated triangular quantum antiferromagnet [6], discovery of a new crystallographic superstructure in a doped spin-orbit Mott insulator that interpolates between honeycomb and triangular structures [4], first characterization of spin excitations in a Kitaev magnet with counter-rotating spin spirals [2], experimental characterization of spin dynamics in the proximity of quantum criticality for coupled spin-1/2 ladders [1], direct observation of electron-phonon couplings in a spin-orbit Mott insulator [3], experimental characterization of quantum entanglement in a quasi-one-dimensional magnet using inelastic neutron scattering [10], experimental observation of a transition from a spin-orbit entangled ground state to a spin-only state with quenched orbital moment induced by applied pressure [5,7], observation of quantum dispersion renormalization effects and two-magnon excitations in the spin-1 square lattice antiferromagnet La2NiO4 [17], experimental observation of tuning the confinement potential between spinons in an Ising chain using longitudinal fields [16], discovery of novel theoretical mechanisms for quantum bound state formation tuned by transverse field in an Ising chain [18], direct experimental observation of six-fold clock anisotropy arising from bond-dependent exchange interactions in strong spin-orbit coupled honeycomb magnets [12,14], breakthrough in the synthesis of single crystals of rare-earth honeycomb and hyperhoneycomb magnets that realize new platforms for quantum compass spin models in the extreme spin-orbit regime [13,15]. More results on the magnetic field dependence of the continuum excitations in an Ising-like triangular lattice quantum antiferromagnet and observation of a novel field induced phase are currently in the process of being written up.
