Fig. 3: Absence of magnons in polarization-resolved RIXS spectra.
From: Liquid-like spin dynamics in a hybrid Heisenberg-Ising antiferromagnet
a Polarization-resolved spectra of Sr2IrO4 along the magnetic zone boundary from (π/2, π/2) to (π, 0), adapted from Ref. 40. Transverse (T) and longitudinal (L) components to the ordered magnetic moments are resolved. The inset shows a quadrant of the Brillouin zone, with the measured wave vectors highlighted by a red line. b Polarization-resolved spectra of Sr5Ir3O11 along the magnetic zone boundary. TSL and LSL denote the transverse and longitudinal components of SL, respectively, while UDL represents the polarization-unresolved background from DL. For the spectrum at (π/2, π/2), the contribution from the transverse component of Sr3Ir2O7 (Supplementary Fig. 6a) is indicated by a gray dashed line. c Polarization-resolved spectra of Sr2IrO4 at (π, π). The inset shows a quadrant of the Brillouin zone, with the measured wave vector highlighted by a red dot. d Polarization-resolved spectra of Sr5Ir3O11 at 0.95(π, π). The gray dashed line indicates the single magnon of DL in UDL extracted from fitting. The error bars are calculated through error propagation from the standard deviations of the raw spectra.
