TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.12.2.056
TI  - Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling
PY  - 2022/02/09
UR  - https://scipost.org/SciPostPhys.12.2.056
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 12
IS  - 2
SP  - 056
A1  - Verkholyak, Taras
AU  - Strecka, Jozef
AB  - Spin-1/2 Heisenberg model on the Shastry-Sutherland lattice is considered within the many-body perturbation theory developed from the exactly solved spin-1/2 Ising-Heisenberg model with the Heisenberg intradimer and Ising interdimer interactions. The former model is widely used for a description of magnetic properties of the layered compound SrCu$_2$(BO$_3$)$_2$, which exhibits a series of fractional magnetization plateaux at sufficiently low temperatures. Using the novel type of many-body perturbation theory we have found the effective model of interacting triplet excitations with the extended hard-core repulsion, which accurately recovers 1/8, 1/6 and 1/4 magnetization plateaux for moderate values of the interdimer coupling. A possible existence of a striking quantum phase of bound triplons is also revealed at low enough magnetic fields.
ER  -

@Article{10.21468/SciPostPhys.12.2.056,
	title={{Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling}},
	author={T. Verkholyak and J. Strecka},
	journal={SciPost Phys.},
	volume={12},
	pages={056},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.12.2.056},
	url={https://scipost.org/10.21468/SciPostPhys.12.2.056},
}