High Magnetic Field, High Pressure Studies of Emergent Bound States in Chemically Doped Shastry-Sutherland System

The orthogonal-dimer antiferromagnet SrCu₂(BO3)₂ (SCBO) is an experimental realization of the two-dimensional Shastry-Sutherland (SSL) model, which represents one of the very few topologies where the ground state of a frustrated lattice could be exactly solved. The delicate competition between the intra-dimer and inter-dimer exchange interactions in SCBO enables tuning of its ground state by a variety of experimental parameters, such as magnetic field, pressure, and chemical doping. While pure SCBO has been well studied, less is known about the doping effect on the SSL system. In this talk we present our recent high-pressure, high-magnetic field neutron scattering and megnetometry results performed on chemically doped SCBO single crystals, where magnetic Cu²⁺ has been substituted with nonmagnetic isoelectronic Mg²⁺. We discuss the interplay between the induced disorder and external tuning parameters, and explain how such correspondence results in stabilizing the emergent new bound states in SSL systems.