Berlin 2018 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 109: Frustrated Magnets - (General) Theory
TT 109.9: Talk
Friday, March 16, 2018, 11:45–12:00, H 3005
Plaquette phases in an extended Shastry-Sutherland model — •Carolin Boos1, Philippe Corboz2, Schelto Crone2, Frédéric Mila3, Ido Niesen2, and Kai Phillip Schmidt1 — 1FAU Erlangen-Nürnberg, Germany — 2University of Amsterdam, Netherlands — 3EPF Lausanne, Switzerland
The frustrated magnet SrCu2(BO3)2 exhibits a quantum phase transition under high pressure.
Without pressure this material is well described by the two-dimensional Shastry-Sutherland model with parameters close to a phase transition towards a ground state of singlets on empty plaquettes.
This state is therefore the natural candidate for the high-pressure phase.
However, it has also been suggested
[1] that a different plaquette phase, where singlets reside on the full plaquettes containing a diagonal bond, is realized in SrCu2(BO3)2.
In this work we use high-order series expansions and infinite projected entangled pair states (iPEPS) to investigate the interplay between empty and full plaquette phases in an extended Shastry-Sutherland model.
M. E. Zayed et al., Nat. Phys. 13 (2017) 962