Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6

Halloran, Thomas; Wang, Yishu; Plumb, K. W.; Stone, M. B.; Winn, Barry; Graves-Brook, M. K.; Rodriguez-Rivera, J. A.; Qiu, Yiming; Chauhan, Prashant; Knolle, Johannes; Moessner, Roderich; Armitage, N. P.; Takayama, Tomohiro; Takagi, Hidenori; Broholm, Collin

doi:10.1038/s41535-025-00748-5

Physics

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Titel:: Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6
Dokumenttyp:: Zeitschriftenaufsatz
Autor(en):: Halloran, Thomas; Wang, Yishu; Plumb, K. W.; Stone, M. B.; Winn, Barry; Graves-Brook, M. K.; Rodriguez-Rivera, J. A.; Qiu, Yiming; Chauhan, Prashant; Knolle, Johannes; Moessner, Roderich; Armitage, N. P.; Takayama, Tomohiro; Takagi, Hidenori; Broholm, Collin
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)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 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.
Zeitschriftentitel:: npj Quantum Materials 2025-03
Jahr:: 2025
Band / Volume:: 10
Heft / Issue:: 1
Volltext / DOI:: doi:10.1038/s41535-025-00748-5
Verlag / Institution:: Springer Science and Business Media LLC
E-ISSN:: 2397-4648
Publikationsdatum:: 29.03.2025
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