Fig. 4: Local Ir electronic structure.
From: Momentum-independent magnetic excitation continuum in the honeycomb iridate H3LiIr2O6
a RIXS intensity as a function of the incident X-ray energy near the Ir L3 edge. The intense inelastic feature centered at E ≈ 3.8 eV is from transitions between occupied t2g states and empty eg orbitals in a Ir4+ ion (see Supplementary Information). White dashed lines in (a) delineate the energy range shown in (b). b Intra-t2g RIXS excitations at Ei = 11.215 keV (circular markers) compared to the calculated RIXS intensity from exact diagonalization calculations. Blue solid line is a fit to the data including a Voigt peak, a DHO, four Gaussian peaks and an arctan step to account for the background (A–D). c O K-edge X-ray absorption spectroscopy data (μ(E)) and fit to the data in H3LiIr2O6 (circular markers; blue line) and α-Li2IrO3 (square markers; orange line). α and β highlight the two main features in the XAS data as discussed in the main text. Solid gray lines show the two Lorentzian and two Gaussian profiles included in the fit. Dashed line represents the arc tangent step to account for the electron hole continuum.
