Halloran, T.
, Wang, Y.
, Plumb, K.
, Stone, M.
, Winn, B.
, Graves-Brook, M.
, Rodriguez Rivera, J.
, Qiu, Y.
, Chauhan, P.
, Armitage, N.
, Takayama, T.
, Takagi, H.
and Broholm, C.
(2024),
Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6, Physical Review Letters
(Accessed April 27, 2024)
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Continuum of magnetic excitations in the Kitaev honeycomb iridate D3LiIr2O6
Published
Author(s)
, Yishu Wang, Kemp Plumb, M. B. Stone, Barry Winn, M. K. Graves-Brook, , , Prashant Chauhan, N. Armitage, Tomohiro Takayama, Hidenori Takagi,
Abstract
Inelastic neutron scattering (INS) measurements of powder D3(7Li)(193Ir)2O6 reveal low energy magnetic excitations with a scattering cross section that is featureless versus |Q| and consistent with a Kitaev spin-liquid (KSL) state. The magnetic nature of the excitation spectrum is demonstrated by polarized neutron studies. The total magnetic moment of 1.7(2)µB/Ir inferred from the total 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 S(Q, ω) for ℏω < 5 meV can be described by a nearest-neighbor Kitaev model with interaction strength K ≈ −10(3) meV. Exchange disorder associated with the mixed D-Li site could play an important role in stabilizing the low T quantum fluctuating state.Citation
Physical Review Letters
Pub Type
Journals
Keywords
Magnetism, Neutron Scattering, Quantum spin liquid, Kitaev spin liquid, Iridates
Citation
Created February 12, 2024, Updated February 15, 2024