High-resolution resonant inelastic x-ray scattering (RIXS) measurements (ΔE = 46 meV) have been performed on Cd2Os2O7 through the metal-to-insulator transition (MIT). A magnetic excitation at 125 meV evolves continuously through the MIT, in agreement with recent Raman scattering results, and provides further confirmation for an all-in, all-out magnetic ground state. Asymmetry of this feature is likely a result of coupling between the electronic and magnetic degrees of freedom. We also observe a broad continuum of interband excitations centered at 0.3 eV energy loss. This is indicative of significant hybridization between Os 5d and O 2p states, and concurrent itinerant nature of the system. In turn, this suggests a possible break down of the free-ion model for Cd2Os2O7.
@article{arxiv.1812.08689,
title = {Spin and orbital dynamics through the metal-to-insulator transition in Cd$_2$Os$_2$O$_7$ probed with high-resolution RIXS},
author = {J. G. Vale and S. Calder and N. A. Bogdanov and C. Donnerer and M. Moretti Sala and N. R. Davies and J. Yamaura and Z. Hiroi and D. Mandrus and J. van den Brink and A. D. Christianson and D. F. McMorrow},
journal= {arXiv preprint arXiv:1812.08689},
year = {2020}
}