  The search for novel unconventional superconductors is a central topic of
modern condensed matter physics. Similar to other Mott insulators,
Shastry-Sutherland (SSL) systems are predicted to become superconducting when
chemically doped. This makes SrCu2(BO3)2, an experimental realization of SSL
model, a suitable candidate and understanding of the doping effects in it very
important. Here we report doping-induced emergent states in Mg-doped
SrCu2(BO3)2, which remain stable up to high magnetic fields. Using four
complementary magnetometry techniques and theoretical simulations, a rich
impurity-induced phenomenology at high fields is discovered. The results
demonstrate a rare example in which even a small doping concentration interacts
strongly with both triplets and bound states of triplets, and thus plays a
significant role in the magnetization process even at high magnetic fields.
Moreover, our findings of the emergence of the very stable impurity pairs
provide insights into the anticipated unconventional superconductivity in
SrCu2(BO3)2 and related materials.
