Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6
Abstract 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 sca...
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Nature Portfolio
2025-03-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-025-00748-5 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Thomas Halloran |
| collection | DOAJ |
| description | Abstract 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)μ B /Ir inferred from the observed magnetic scattering cross-section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the J eff = 1/2 single ion state. The rise in the dynamic correlation function $${\mathcal{S}}(Q,\omega )$$ S ( Q , ω ) for ℏ ω < 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. |
| format | Article |
| id | doaj-art-efd3eb10f39f40b2b156282c901b377e |
| institution | Kabale University |
| issn | 2397-4648 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj-art-efd3eb10f39f40b2b156282c901b377e2025-08-20T03:40:44ZengNature Portfolionpj Quantum Materials2397-46482025-03-011011710.1038/s41535-025-00748-5Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6Thomas Halloran0Yishu Wang1K. W. Plumb2M. B. Stone3Barry Winn4M. K. Graves-Brook5J. A. Rodriguez-Rivera6Yiming Qiu7Prashant Chauhan8Johannes Knolle9Roderich Moessner10N. P. Armitage11Tomohiro Takayama12Hidenori Takagi13Collin Broholm14Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins UniversityInstitute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins UniversityDepartment of Physics, Brown UniversityNeutron Scattering Division, Oak Ridge National LaboratoryNeutron Scattering Division, Oak Ridge National LaboratoryNeutron Scattering Division, Oak Ridge National LaboratoryNIST Center for Neutron ResearchNIST Center for Neutron ResearchInstitute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins UniversityDepartment of Physics TQM, Technische Universität MünchenMax-Planck-Institut für Physik komplexer SystemeInstitute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins UniversityMax Planck Institute for Solid State ResearchMax Planck Institute for Solid State ResearchInstitute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins UniversityAbstract 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)μ B /Ir inferred from the observed magnetic scattering cross-section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the J eff = 1/2 single ion state. The rise in the dynamic correlation function $${\mathcal{S}}(Q,\omega )$$ S ( Q , ω ) for ℏ ω < 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.https://doi.org/10.1038/s41535-025-00748-5 |
| spellingShingle | 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 Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 npj Quantum Materials |
| title | Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 |
| title_full | Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 |
| title_fullStr | Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 |
| title_full_unstemmed | Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 |
| title_short | Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6 |
| title_sort | continuum of magnetic excitations in the kitaev honeycomb iridate d3liir2o6 |
| url | https://doi.org/10.1038/s41535-025-00748-5 |
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