Continuum of magnetic excitations in the Kitaev honeycomb iridate D$_3$LiIr$_2$O$_6$
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929241966247936 |
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| author | Halloran, Thomas Wang, Yishu Plumb, K. W. Stone, M. B. Winn, Barry Graves-Brook, M. K. Rodriguez-Rivera, J. A. Qui, Yiming Chauhan, Prashant Knolle, Johannes Moessner, Roderich Armitage, N. P. Takayama, Tomohiro Takagi, Hidenori Broholm, Collin |
| author_facet | Halloran, Thomas Wang, Yishu Plumb, K. W. Stone, M. B. Winn, Barry Graves-Brook, M. K. Rodriguez-Rivera, J. A. Qui, Yiming Chauhan, Prashant Knolle, Johannes Moessner, Roderich Armitage, N. P. Takayama, Tomohiro Takagi, Hidenori Broholm, Collin |
| contents | Inelastic neutron scattering (INS) measurements of powder D$_3(^{7}$Li)($^{193}$Ir)$_2$O$_6$ reveal low energy magnetic excitations with a scattering cross section that is broad in $|Q|$ and consistent with a Kitaev spin-liquid (KSL) state. The magnetic nature of the excitation spectrum is demonstrated by longitudinally polarized neutron studies. The total magnetic moment of 1.7(2)$μ_B$/Ir inferred from the total magnetic scattering cross section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the $J_{\rm eff}=1/2$ single ion state. The rise in the dynamic correlation function ${\cal S}(Q,ω)$ for $\hbarω<5~$meV can be described by a nearest-neighbor Kitaev model with interaction strength $K\approx-13(5)$~meV. Exchange disorder associated with the mixed D-Li site could play an important role in stabilizing the low $T$ quantum fluctuating state. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_08083 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Continuum of magnetic excitations in the Kitaev honeycomb iridate D$_3$LiIr$_2$O$_6$ Halloran, Thomas Wang, Yishu Plumb, K. W. Stone, M. B. Winn, Barry Graves-Brook, M. K. Rodriguez-Rivera, J. A. Qui, Yiming Chauhan, Prashant Knolle, Johannes Moessner, Roderich Armitage, N. P. Takayama, Tomohiro Takagi, Hidenori Broholm, Collin Strongly Correlated Electrons Inelastic neutron scattering (INS) measurements of powder D$_3(^{7}$Li)($^{193}$Ir)$_2$O$_6$ reveal low energy magnetic excitations with a scattering cross section that is broad in $|Q|$ and consistent with a Kitaev spin-liquid (KSL) state. The magnetic nature of the excitation spectrum is demonstrated by longitudinally polarized neutron studies. The total magnetic moment of 1.7(2)$μ_B$/Ir inferred from the total magnetic scattering cross section is consistent with the effective moment inferred from magnetic susceptibility data and expectations for the $J_{\rm eff}=1/2$ single ion state. The rise in the dynamic correlation function ${\cal S}(Q,ω)$ for $\hbarω<5~$meV can be described by a nearest-neighbor Kitaev model with interaction strength $K\approx-13(5)$~meV. Exchange disorder associated with the mixed D-Li site could play an important role in stabilizing the low $T$ quantum fluctuating state. |
| title | Continuum of magnetic excitations in the Kitaev honeycomb iridate D$_3$LiIr$_2$O$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2402.08083 |