Quantum phases of the Shastry-Sutherland antiferromagnet: Application to SrCu2(BO3)2

Chung-Hou Chung, J. B. Marston, Subir Sachdev

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

We 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.

Original languageEnglish
Article number134407
Pages (from-to)1-11
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number13
DOIs
StatePublished - 1 Oct 2001

Fingerprint Dive into the research topics of 'Quantum phases of the Shastry-Sutherland antiferromagnet: Application to SrCu<sub>2</sub>(BO<sub>3</sub>)<sub>2</sub>'. Together they form a unique fingerprint.

Cite this