Kondo quasiparticle dynamics observed by resonant inelastic x-ray scattering

0563766 - FZÚ 2023 RIV GB eng J - Journal Article
Rahn, M.C. - Kummer, K. - Hariki, A. - Ahn, Kyo-Hoon - Kuneš, J. - Amorese, A. - Denlinger, J.D. - Lu, D.-H. - Hashimoto, M. - Rienks, E. - Valvidares, M. - Haslbeck, F. - Byler, D.D. - McClellan, K.J. - Bauer, E.D. - Zhu, J. X. - Booth, C.H. - Christianson, A.D. - Lawrence, J.M. - Ronning, F. - Janoschek, M.
Kondo quasiparticle dynamics observed by resonant inelastic x-ray scattering.
Nature Communications. Roč. 13, č. 1 (2022), č. článku 6129. E-ISSN 2041-1723
R&D Projects: GA ČR(CZ) GA19-06433S
Institutional support: RVO:68378271
Keywords : CePd₃ * Kondo quasiparticle * RIXS
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 16.6, year: 2022
Method of publishing: Open access

Effective models focused on pertinent low-energy degrees of freedom have substantially contributed to our qualitative understanding of quantum materials. An iconic example, the Kondo model, was key to demonstrating that the rich phase diagrams of correlated metals originate from the interplay of localized and itinerant electrons. Modern electronic structure calculations suggest that to achieve quantitative material-specific models, accurate consideration of the crystal field and spin-orbit interactions is imperative. This poses the question of how local high-energy degrees of freedom become incorporated into a collective electronic state. Here, we use resonant inelastic x-ray scattering (RIXS) on CePd3 to clarify the fate of all relevant energy scales. We find that even spin-orbit excited states acquire pronounced momentum-dependence at low temperature—the telltale sign of hybridization with the underlying metallic state.

Permanent Link: https://hdl.handle.net/11104/0335581