Fig. 6
From: The nature of spin excitations in the one-third magnetization plateau phase of Ba3CoSb2O9
Field-dependence of ω1–ω3 at q = (1/3, 1/3, 1) in the UUD phase of Ba3CoSb2O9. a Constant-q scans for the selected values of the magnetic field at T = 0.1 K. The solid-lines show the fitting to Gaussian functions. The locations of the magnon peaks are indicated, where the solid (ω1), dashed (ω2), and dotted (ω3) lines are guides to the eye. b Simulation of the line-shape by NLSW theory for J = 1.74 meV, Δ = 0.85, Jc/J = 0.09, and g⊥ = 3.95 convoluted with the assumed resolution 0.2 meV. c Comparison of the fitted magnon frequencies ω1–ω3 against the NLSW poles. Error bars represent one standard deviation
