Kondo scale and coupled fluorescence across the γ-α transition in Ce 0.93 Sc 0.07 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2023

Kondo scale and coupled fluorescence across the γ-α transition in Ce 0.93 Sc 0.07

Résumé

We present a resonant inelastic x-ray scattering (RIXS) study across the temperature (T) driven γ-α transition in Ce 0.93 Sc 0.07. RIXS measurements across the Ce M 5 edge unambiguously identify the f 1 → f 0 and f 1 → f 2 charge excitations, which provide a quantification of the Ce on-site Coulomb repulsion energy, U f f. Calculation with a simplified single-impurity Anderson model combined with full multiplet theory reproduces the charge excitations and establishes that the very different Kondo temperatures of the γ to α phase are reflected in RIXS spectra. A systematic T-dependent hysteresis is observed for the f 0 final state spectral intensity upon cycling across the γ-α transition. In addition, a fluorescencelike structure also follows the same hysteretic behavior and shows it is directly connected to the weight of the f 0 configuration in the ground state. The results indicate that the Ce M-edge RIXS is a reliable quantitative probe of the electronic structure of strongly correlated Ce-based Kondo systems and is sensitive to the emergent Kondo energy scale.
Fichier principal
Vignette du fichier
Tegomo RIXS Ce PhysRevB.108.195110.pdf (2.51 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04274280 , version 1 (07-11-2023)

Identifiants

Citer

Bodry Tegomo Chiogo, Alessandro Nicolaou, Thierry Schweitzer, T. Mazet, Ashish Chainani, et al.. Kondo scale and coupled fluorescence across the γ-α transition in Ce 0.93 Sc 0.07. Physical Review B, 2023, 108 (19), pp.195110. ⟨10.1103/PhysRevB.108.195110⟩. ⟨hal-04274280⟩
57 Consultations
19 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More