Collapse of susceptibility and non-trivial spin dynamics in the hyper-honeycomb magnet $β$-Li$_2$IrO$_3$ under high pressure
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911316191477760 |
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| author | Verrier, Aimé Nagarajan, Vikram Gendron, Louis-Thomas Analytis, James G. Quilliam, Jeffrey A. |
| author_facet | Verrier, Aimé Nagarajan, Vikram Gendron, Louis-Thomas Analytis, James G. Quilliam, Jeffrey A. |
| contents | We present high-pressure (2 GPa) $^7$Li nuclear magnetic resonance (NMR) measurements on single crystals of the hyper-honeycomb Kitaev magnet $β$-Li$_2$IrO$_3$. The spectra show evidence for a structural phase transition around 200 K and a coexistence of phases, consistent with the results of other measurement techniques. The NMR spectra and line shift measurements demonstrate a strong suppression of the local magnetic susceptibility at high pressure. However, the spin-lattice relaxation ($1/T_1$) shows a clear power-law temperature dependence. This is inconsistent with a gapped singlet ground state of dimers and tetramers, as was previously proposed, and is instead evocative of a more exotic quantum spin liquid-like ground state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_16873 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Collapse of susceptibility and non-trivial spin dynamics in the hyper-honeycomb magnet $β$-Li$_2$IrO$_3$ under high pressure Verrier, Aimé Nagarajan, Vikram Gendron, Louis-Thomas Analytis, James G. Quilliam, Jeffrey A. Strongly Correlated Electrons We present high-pressure (2 GPa) $^7$Li nuclear magnetic resonance (NMR) measurements on single crystals of the hyper-honeycomb Kitaev magnet $β$-Li$_2$IrO$_3$. The spectra show evidence for a structural phase transition around 200 K and a coexistence of phases, consistent with the results of other measurement techniques. The NMR spectra and line shift measurements demonstrate a strong suppression of the local magnetic susceptibility at high pressure. However, the spin-lattice relaxation ($1/T_1$) shows a clear power-law temperature dependence. This is inconsistent with a gapped singlet ground state of dimers and tetramers, as was previously proposed, and is instead evocative of a more exotic quantum spin liquid-like ground state. |
| title | Collapse of susceptibility and non-trivial spin dynamics in the hyper-honeycomb magnet $β$-Li$_2$IrO$_3$ under high pressure |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.16873 |