Vale, JG; Calder, S; Bogdanov, NA; Donnerer, C; Sala, MM; Davies, NR; Mandrus, D; ... McMorrow, DF; + view all Vale, JG; Calder, S; Bogdanov, NA; Donnerer, C; Sala, MM; Davies, NR; Mandrus, D; van den Brink, J; Christianson, AD; McMorrow, DF; - view fewer (2020) Spin and orbital excitations through the metal-to-insulator transition in Cd2Os2O7 probed with high-resolution resonant inelastic x-ray scattering. Physical Review B , 101 (1) , Article 014441. 10.1103/PhysRevB.101.014441.

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Abstract

High-resolution resonant inelastic x-ray scattering measurements ( Δ E = 46 meV ) have been performed on Cd 2 Os 2 O 7 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 the 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 5 d and O 2 p states and the concurrent itinerant nature of the system. In turn, this suggests a possible breakdown of the free-ion model for Cd 2 Os 2 O 7 .

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