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The search for novel unconventional superconductors is a central topic ofmodern condensed matter physics. Similar to other Mott insulators,Shastry-Sutherland (SSL) systems are predicted to become superconducting whenchemically doped. This makes SrCu2(BO3)2, an experimental realization of SSLmodel, a suitable candidate and understanding of the doping effects in it veryimportant. Here we report doping-induced emergent states in Mg-dopedSrCu2(BO3)2, which remain stable up to high magnetic fields. Using fourcomplementary magnetometry techniques and theoretical simulations, a richimpurity-induced phenomenology at high fields is discovered. The resultsdemonstrate a rare example in which even a small doping concentration interactsstrongly with both triplets and bound states of triplets, and thus plays asignificant role in the magnetization process even at high magnetic fields.Moreover, our findings of the emergence of the very stable impurity pairsprovide insights into the anticipated unconventional superconductivity inSrCu2(BO3)2 and related materials.

Emergent Bound States and Impurity Pairs in Chemically Doped Shastry-Sutherland System