Chung, C. H.Marston, J. B.Sachdev, Subir2019-09-272001Chung, C. H., J. B. Marston, and Subir Sachdev. 2001. “Quantum Phases of the Shastry-Sutherland Antiferromagnet: Application toSrCu2(BO3)2.” Physical Review B 64 (13). https://doi.org/10.1103/physrevb.64.134407.1098-01211550-235Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417230We study possible paramagnetic phases of antiferromagnets on the Shastry-Sutherland lattice by a gauge-theoretic analysis of fluctuations in a theory with Sp(2N) symmetry. In addition to the familiar dimer phase, we find a confining phase with plaquette order and a topologically ordered phase with deconfined S = 1/2 spinons and helical spin correlations. The deconfined phase is contiguous to the dimer phase and in a regime of couplings close to those found in the insulator SrCu2(BO3)(2). We suggest that a superconductor obtained by doping this insulator with mobile charge carriers will be an attractive candidate for observing the anomalous magnetic flux properties associated with topological order.en-USJournal Article2019-09-2710.1103/PhysRevB.64.134407