The Phase Diagram of the Shastry-Sutherland Antiferromagnet

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The Shastry-Sutherland model, which provides a representation of the magnetic properties of SrCu$_2$(BO$_3$)$_2$, has been studied by series expansion methods at T=0. Our results support the existence of an intermediate phase between the Néel long-range ordered phase and the short-range dimer phase. They provide strong evidence against the existence of helical order in the intermediate phase, and and somewhat less strong evidence against a plaquette-singlet phase. The nature of the intermediate phase thus remains elusive. It appears to be gapless, or nearly so.
RevTeX, 10 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/17964

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0107019
 http://arxiv.org/abs/cond-mat/0107019

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arXiv