Composite quasi-particles with emergent functionalities in spintronic and quantum info science will be realized in correlated supplies attributable to entangled cost, spin, orbital, and lattice levels of freedom. Right here we present that by lowering the lateral dimension of correlated antiferromagnet NiPS3 flakes to tens of nanometers and thickness to lower than ten nanometers, we will switch-off the majority spin-orbit entangled exciton within the near-infrared (1.47 eV) and activate visible-range (1.8 – 2.2 eV) transitions. These ultra-sharp traces (<120 µeV at 4.2 Ok) share the spin-correlated nature of the majority exciton by displaying a powerful linear polarization beneath Néel temperature. Moreover, exciton photoluminescence lineshape evaluation reveals a polaronic character by way of coupling with at-least 3 phonon modes and a comb-like Stark impact by way of discretization of expenses in every layer. These findings increase the information on the many-body nature of excitonic quasi-particles in correlated antiferromagnets and likewise set up the nanoscale correlated antiferromagnets as a promising platform for built-in magneto-optic gadgets.
