Figure 1: Magnetic excitation spectra in (Y,Lu)MnO3.
From: Spontaneous decays of magneto-elastic excitations in non-collinear antiferromagnet (Y,Lu)MnO3
(a) A Mn-O layer in RMnO3 forming a distorted 2D triangular antiferromagnet. (b) Inelastic neutron scattering data on LuMnO3 summed over an energy window of [19.5, 20.5] meV. The arrows in b indicate the reciprocal points where the data shown in c–e are cut. (c–e) The inelastic neutron-scattering data along the high symmetric directions (red circle and contour map) and fitted dispersion (black solid curve) for (c) YMnO3, (d) Y0.5Lu0.5MnO3 and (e) LuMnO3 calculated by linear spin wave theory. (f–h) Calculated dynamical spin structure factors using the minimal spin Hamiltonian, equation (4) in the Supplementary Note 2 for (f) YMnO3, (g) Y0.5Lu0.5MnO3 and (h) LuMnO3. For our simulations, we used the momentum and energy resolution of the instrument at the elastic line.
