Extended Data Figure 8: NMR spectra of H₃LiIr₂O₆ before and after the alignment of the powder sample.

Before the alignment (top), an asymmetric line shape in obtained (reflecting the anisotropy in the Knight shift K_‖ versus K_⊥; Fig. 2a), which represents a powder pattern. The middle and bottom curves shown the line shapes obtained after the alignment for B along the honeycomb plane (the magnetic easy plane) and perpendicular to the plane, respectively. Because of the easy-plane anisotropy of H₃LiIr₂O₆, the alignment for the direction perpendicular to the plane is not as complete as that for the direction parallel to the plane.