Fig. 4
From: Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure
Spin-wave theory prediction for the one-magnon energy at the Brillouin zone center as a function of tetrahedral distortion (θ) for selected IrO6 octahedron rotation angles (α). The ratio of Hund’s coupling to the on-site Coulomb interaction η = (JH/U) is fixed. The theoretical model and parameters for ambient pressure are adopted from the ref. 22
