Quantum phases of the Shastry-Sutherland antiferromagnet: Application to SrCu 2 ( BO 3 ) 2
Chung, C. H.
Marston, J. B.
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CitationChung, 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.
AbstractWe 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.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417230
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