Pressure-dependent magnetism of the Kitaev candidate Li$_2$RhO$_3$
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arXiv
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| Format: | Preprint |
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2024
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| author | Shen, Bin Pazmino, Efrain Insuasti Dhakal, Ramesh Freund, Friedrich Gegenwart, Philipp Winter, Stephen M. Tsirlin, Alexander A. |
| author_facet | Shen, Bin Pazmino, Efrain Insuasti Dhakal, Ramesh Freund, Friedrich Gegenwart, Philipp Winter, Stephen M. Tsirlin, Alexander A. |
| contents | We use magnetization measurements under pressure along with \textit{ab initio} and cluster many-body calculations to investigate magnetism of the Kitaev candidate Li$_2$RhO$_3$. Hydrostatic compression leads to a decrease in the magnitude of the nearest-neighbor ferromagnetic Kitaev coupling $K_1$ and the corresponding increase in the off-diagonal anisotropy $Γ_1$, whereas the experimental Curie-Weiss temperature changes from negative to positive with the slope of +40~K/GPa. On the other hand, spin freezing persists up to at least 3.46~GPa with the almost constant freezing temperature of 5~K that does not follow the large changes in the exchange couplings and indicates the likely extrinsic origin of spin freezing. Magnetic frustration in Li$_2$RhO$_3$ is mainly related to the interplay between ferromagnetic $K_1$ and antiferromagnetic $Γ_1$, along with the weakness of the third-neighbor coupling $J_3$ that would otherwise stabilize zigzag order. The small $J_3$ distinguishes Li$_2$RhO$_3$ from other Kitaev candidates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_14077 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pressure-dependent magnetism of the Kitaev candidate Li$_2$RhO$_3$ Shen, Bin Pazmino, Efrain Insuasti Dhakal, Ramesh Freund, Friedrich Gegenwart, Philipp Winter, Stephen M. Tsirlin, Alexander A. Strongly Correlated Electrons Materials Science We use magnetization measurements under pressure along with \textit{ab initio} and cluster many-body calculations to investigate magnetism of the Kitaev candidate Li$_2$RhO$_3$. Hydrostatic compression leads to a decrease in the magnitude of the nearest-neighbor ferromagnetic Kitaev coupling $K_1$ and the corresponding increase in the off-diagonal anisotropy $Γ_1$, whereas the experimental Curie-Weiss temperature changes from negative to positive with the slope of +40~K/GPa. On the other hand, spin freezing persists up to at least 3.46~GPa with the almost constant freezing temperature of 5~K that does not follow the large changes in the exchange couplings and indicates the likely extrinsic origin of spin freezing. Magnetic frustration in Li$_2$RhO$_3$ is mainly related to the interplay between ferromagnetic $K_1$ and antiferromagnetic $Γ_1$, along with the weakness of the third-neighbor coupling $J_3$ that would otherwise stabilize zigzag order. The small $J_3$ distinguishes Li$_2$RhO$_3$ from other Kitaev candidates. |
| title | Pressure-dependent magnetism of the Kitaev candidate Li$_2$RhO$_3$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2409.14077 |