2024/02/12 by Thomas Halloran, Halloran, Thomas, Yishu Wang +27
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Crystal Structures and Properties #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2402.08083
openalex publication_date 2024/02/12 · openalex created_date 2024/02/15 · openalex updated_date 2026/08/01
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 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)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 J\rm eff=1/2 single ion state. The rise in the dynamic correlation function \cal S(Q,ω) for ℏω<5~meV can be described by a nearest-neighbor Kitaev model with interaction strength K≈-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.