Thomas Halloran, Yishu Wang, K. W. Plumb, M. B. Stone, Barry Winn, M. K. Graves-Brook, J. A. Rodriguez-Rivera, Yiming Qiu, Prashant Chauhan, Johannes Knolle, Roderich Moessner, N. P. Armitage, Tomohiro Takayama, Hidenori Takagi, Collin Broholm
{"title":"基塔耶夫蜂窝状铱酸D3LiIr2O6的连续磁激励","authors":"Thomas Halloran, Yishu Wang, K. W. Plumb, M. B. Stone, Barry Winn, M. K. Graves-Brook, J. A. Rodriguez-Rivera, Yiming Qiu, Prashant Chauhan, Johannes Knolle, Roderich Moessner, N. P. Armitage, Tomohiro Takayama, Hidenori Takagi, Collin Broholm","doi":"10.1038/s41535-025-00748-5","DOIUrl":null,"url":null,"abstract":"<p>Inelastic neutron scattering (INS) measurements of powder D<sub>3</sub>(<sup>7</sup>Li)(<sup>193</sup>Ir)<sub>2</sub>O<sub>6</sub> reveal low energy magnetic excitations with a scattering cross-section that is broad in <span>∣</span><i>Q</i><span>∣</span> and energy transfer. The magnetic nature of the excitation spectrum is demonstrated by longitudinally polarized neutron scattering. The total magnetic moment of 1.8(4)<i>μ</i><sub><i>B</i></sub>/Ir inferred from the observed magnetic scattering cross-section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the <i>J</i><sub>eff</sub> = 1/2 single ion state. The rise in the dynamic correlation function <span>\\({\\mathcal{S}}(Q,\\omega )\\)</span> for <i><span>ℏ</span></i><i>ω</i> < 5 meV can be described by a simple model assuming nearest-neighbor anisotropic spin exchange, such as that found in the Kitaev model. Exchange disorder associated with the D site likely plays an important role in stabilizing the low <i>T</i> quantum fluctuating state<sup>1,2</sup>.</p>","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"15 1","pages":""},"PeriodicalIF":5.4000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6\",\"authors\":\"Thomas Halloran, Yishu Wang, K. W. Plumb, M. B. Stone, Barry Winn, M. K. Graves-Brook, J. A. Rodriguez-Rivera, Yiming Qiu, Prashant Chauhan, Johannes Knolle, Roderich Moessner, N. P. Armitage, Tomohiro Takayama, Hidenori Takagi, Collin Broholm\",\"doi\":\"10.1038/s41535-025-00748-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Inelastic neutron scattering (INS) measurements of powder D<sub>3</sub>(<sup>7</sup>Li)(<sup>193</sup>Ir)<sub>2</sub>O<sub>6</sub> reveal low energy magnetic excitations with a scattering cross-section that is broad in <span>∣</span><i>Q</i><span>∣</span> and energy transfer. The magnetic nature of the excitation spectrum is demonstrated by longitudinally polarized neutron scattering. The total magnetic moment of 1.8(4)<i>μ</i><sub><i>B</i></sub>/Ir inferred from the observed magnetic scattering cross-section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the <i>J</i><sub>eff</sub> = 1/2 single ion state. The rise in the dynamic correlation function <span>\\\\({\\\\mathcal{S}}(Q,\\\\omega )\\\\)</span> for <i><span>ℏ</span></i><i>ω</i> < 5 meV can be described by a simple model assuming nearest-neighbor anisotropic spin exchange, such as that found in the Kitaev model. Exchange disorder associated with the D site likely plays an important role in stabilizing the low <i>T</i> quantum fluctuating state<sup>1,2</sup>.</p>\",\"PeriodicalId\":19283,\"journal\":{\"name\":\"npj Quantum Materials\",\"volume\":\"15 1\",\"pages\":\"\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2025-03-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"npj Quantum Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1038/s41535-025-00748-5\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"npj Quantum Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1038/s41535-025-00748-5","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6
Inelastic neutron scattering (INS) measurements of powder D3(7Li)(193Ir)2O6 reveal low energy magnetic excitations with a scattering cross-section that is broad in ∣Q∣ and energy transfer. The magnetic nature of the excitation spectrum is demonstrated by longitudinally polarized neutron scattering. The total magnetic moment of 1.8(4)μB/Ir inferred from the observed magnetic scattering cross-section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the Jeff = 1/2 single ion state. The rise in the dynamic correlation function \({\mathcal{S}}(Q,\omega )\) for ℏω < 5 meV can be described by a simple model assuming nearest-neighbor anisotropic spin exchange, such as that found in the Kitaev model. Exchange disorder associated with the D site likely plays an important role in stabilizing the low T quantum fluctuating state1,2.
期刊介绍：
npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications.
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