Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling
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...
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| Format: | Article |
| Language: | English |
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SciPost
2022-02-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.12.2.056 |
| _version_ | 1818896670944919552 |
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| author | T. Verkholyak, J. Strecka |
| author_facet | T. Verkholyak, J. Strecka |
| author_sort | T. Verkholyak, J. Strecka |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-19T19:03:59Z |
| format | Article |
| id | doaj.art-54c389f735224a45ad1b4b9d7d2e7793 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-12-19T19:03:59Z |
| publishDate | 2022-02-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-54c389f735224a45ad1b4b9d7d2e77932022-12-21T20:09:29ZengSciPostSciPost Physics2542-46532022-02-0112205610.21468/SciPostPhys.12.2.056Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer couplingT. Verkholyak, J. StreckaSpin-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.https://scipost.org/SciPostPhys.12.2.056 |
| spellingShingle | T. Verkholyak, J. Strecka Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling SciPost Physics |
| title | Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling |
| title_full | Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling |
| title_fullStr | Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling |
| title_full_unstemmed | Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling |
| title_short | Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling |
| title_sort | fractional magnetization plateaux of a spin 1 2 heisenberg model on the shastry sutherland lattice effect of quantum xy interdimer coupling |
| url | https://scipost.org/SciPostPhys.12.2.056 |
| work_keys_str_mv | AT tverkholyakjstrecka fractionalmagnetizationplateauxofaspin12heisenbergmodelontheshastrysutherlandlatticeeffectofquantumxyinterdimercoupling |