Theory of magnetism for rare-earth magnets on the Shastry-Sutherland lattice with non-Kramers ions
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| Format: | Preprint |
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2024
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| _version_ | 1866915382427648000 |
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| author | Duan, Guijing Yu, Rong Liu, Changle |
| author_facet | Duan, Guijing Yu, Rong Liu, Changle |
| contents | Motivated by the rapid experimental progress on the rare-earth Shastry-Sutherland lattice magnets, we propose a generic effective spin model that describes interacting non-Kramers local moments on the Shastry-Sutherland lattice. We point out that the local moments consist of both magnetic dipole and quadrupole components and the effective model turns out to be an extended XYZ model with an intrinsic field that accounts for the crystal field splitting. We then study the ground-state phase diagram of the model and find that pure quadrupole orders, which are invisible to conventional experimental probes, can be stabilized over a broad regime. In particular, we show that a hidden ``1/3 magnetization plateau'' with quadrupole orders generally exists and discuss its experimental signatures. Finally, we discuss the relevance of our results to the rare-earth Shastry-Sutherland lattice magnets Pr$_{2}$Ga$_{2}$BeO$_{7}$ and Pr$_{2}$Be$_{2}$GeO$_{7}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_12534 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Theory of magnetism for rare-earth magnets on the Shastry-Sutherland lattice with non-Kramers ions Duan, Guijing Yu, Rong Liu, Changle Strongly Correlated Electrons Materials Science Motivated by the rapid experimental progress on the rare-earth Shastry-Sutherland lattice magnets, we propose a generic effective spin model that describes interacting non-Kramers local moments on the Shastry-Sutherland lattice. We point out that the local moments consist of both magnetic dipole and quadrupole components and the effective model turns out to be an extended XYZ model with an intrinsic field that accounts for the crystal field splitting. We then study the ground-state phase diagram of the model and find that pure quadrupole orders, which are invisible to conventional experimental probes, can be stabilized over a broad regime. In particular, we show that a hidden ``1/3 magnetization plateau'' with quadrupole orders generally exists and discuss its experimental signatures. Finally, we discuss the relevance of our results to the rare-earth Shastry-Sutherland lattice magnets Pr$_{2}$Ga$_{2}$BeO$_{7}$ and Pr$_{2}$Be$_{2}$GeO$_{7}$. |
| title | Theory of magnetism for rare-earth magnets on the Shastry-Sutherland lattice with non-Kramers ions |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2409.12534 |