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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2407.17559 |
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| _version_ | 1866912364119457792 |
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| author | Wang, Qiaochu de la Torre, Alberto Rodriguez-Rivera, Jose A. Podlesnyak, Andrey A. Tian, Wei Aczel, Adam A. Matsuda, Masaaki Ryan, Philip J. Kim, Jong-Woo Rau, Jeffrey G. Plumb, Kemp W. |
| author_facet | Wang, Qiaochu de la Torre, Alberto Rodriguez-Rivera, Jose A. Podlesnyak, Andrey A. Tian, Wei Aczel, Adam A. Matsuda, Masaaki Ryan, Philip J. Kim, Jong-Woo Rau, Jeffrey G. Plumb, Kemp W. |
| contents | Competing interactions in frustrated magnets can give rise to highly degenerate ground states from which correlated liquid-like states of matter often emerge. The scaling of this degeneracy influences the ultimate ground state, with extensive degeneracies potentially yielding quantum spin liquids, while sub-extensive or smaller degeneracies yield static orders. A longstanding problem is to understand how ordered states precipitate from this degenerate manifold and what echoes of the degeneracy survive ordering. Here, we use neutron scattering to experimentally demonstrate a new "nodal line" spin liquid, where spins collectively fluctuate within a sub-extensive manifold spanning one-dimensional lines in reciprocal space. Realized in the spin-orbit coupled, face-centered cubic iridate K$_2$IrCl$_6$, we show that the sub-extensive degeneracy is robust, but remains susceptible to fluctuations or longer range interactions which cooperate to select a magnetic order at low temperatures. Proximity to the nodal line spin liquid influences the ordered state, enhancing the effects of quantum fluctuations and stabilizing it through the opening of a large spin-wave gap. Our results demonstrate quantum fluctuations can act counter-intuitively in frustrated materials: instead of destabilizing ordering, at the brink of the nodal spin liquid they can act to stabilize it and dictate its low-energy physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_17559 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pulling order back from the brink of disorder: Observation of a nodal line spin liquid and fluctuation stabilized order in K$_2$IrCl$_6$ Wang, Qiaochu de la Torre, Alberto Rodriguez-Rivera, Jose A. Podlesnyak, Andrey A. Tian, Wei Aczel, Adam A. Matsuda, Masaaki Ryan, Philip J. Kim, Jong-Woo Rau, Jeffrey G. Plumb, Kemp W. Strongly Correlated Electrons Competing interactions in frustrated magnets can give rise to highly degenerate ground states from which correlated liquid-like states of matter often emerge. The scaling of this degeneracy influences the ultimate ground state, with extensive degeneracies potentially yielding quantum spin liquids, while sub-extensive or smaller degeneracies yield static orders. A longstanding problem is to understand how ordered states precipitate from this degenerate manifold and what echoes of the degeneracy survive ordering. Here, we use neutron scattering to experimentally demonstrate a new "nodal line" spin liquid, where spins collectively fluctuate within a sub-extensive manifold spanning one-dimensional lines in reciprocal space. Realized in the spin-orbit coupled, face-centered cubic iridate K$_2$IrCl$_6$, we show that the sub-extensive degeneracy is robust, but remains susceptible to fluctuations or longer range interactions which cooperate to select a magnetic order at low temperatures. Proximity to the nodal line spin liquid influences the ordered state, enhancing the effects of quantum fluctuations and stabilizing it through the opening of a large spin-wave gap. Our results demonstrate quantum fluctuations can act counter-intuitively in frustrated materials: instead of destabilizing ordering, at the brink of the nodal spin liquid they can act to stabilize it and dictate its low-energy physics. |
| title | Pulling order back from the brink of disorder: Observation of a nodal line spin liquid and fluctuation stabilized order in K$_2$IrCl$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.17559 |