Abstract
Motivated by the remarkable properties of in a magnetic field, we use perturbative continuous unitary transformations to determine the magnetization plateaux of the Shastry-Sutherland model, unveiling an unexpected sequence of plateaux progressively appearing at , , , and upon increasing the interdimer coupling. We predict that a plateau should be present in , even if residual interactions beyond the Shastry-Sutherland are strong enough to modify the other plateaux below . The method is extended to calculate the magnetization profile within the plateaux, leading to a local structure around triplons that agrees with NMR results on .
- Received 20 June 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.250402
©2008 American Physical Society