Extended Data Figure 4: NMR spectral parameters and estimate of the hyperfine coupling constant in H3LiIr2O6.
From: A spin–orbital-entangled quantum liquid on a honeycomb lattice
a, HWHM obtained by performing a Gaussian fit near the top of each peak. The open symbols are for B perpendicular to the honeycomb plane (⊥); the filled symbols are for B parallel to the plane (‖). The length of the arrow corresponds to a hyperfine field at a Li site when a moment of 0.002μB is placed on the Ir atoms. b, The integrated NMR signal intensities after T1 and T2 corrections, which is proportional to the number of nuclei under observation. c, Bulk magnetic susceptibility χ(T) of aligned powder at 7 T after the subtraction of core diamagnetism, with B parallel (purple crosses) and perpendicular (green pluses) to the honeycomb plane. The solid lines represent the intrinsic susceptibility χi calculated from χ by subtracting the Curie contribution that originates from the impurities and/or defects. The dotted lines are high-temperature (above 250 K) Curie–Weiss fits, which yield a Curie–Weiss temperature and effective moment in a parallel field of 
and 
, respectively, and in a perpendicular field of 
and 
. NMR Knight shifts K for 7Li measured at 2 T (purple triangles and green diamonds) are superposed for comparisons. d, K for 7Li plotted against χi. The data in a temperature region T > 150 K are well described by the linear relation K(T) = [Ahf/(NAμB)]χi (solid line), from which we determine the isotropic hyperfine coupling constant Ahf = 0.44/μB T.
