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Title: CaCu3Ru4O12 : a high-Kondo-temperature transition-metal oxide
Author(s): Takegami, D.
Kuo, C.-Y.
Kasebayashi, K.
Kim, J.-G.
Chang, Chun-FuLook up in the Integrated Authority File of the German National Library
Liu, C. E.
Wu, C. N.
Kasinathan, DeepaLook up in the Integrated Authority File of the German National Library
Altendorf, S. G.
Hoefer, K.
Meneghin, F.
Marino, A.
Liao, Y. F.
Tsuei, K. D.
Chen, C. T.
Ko, K.-T.
Günther, A.
Ebbinghaus, StefanLook up in the Integrated Authority File of the German National Library
Seo, J. W.
Lee, D. H.
Ryu, G.
Komarek, A. C.
Sugano, S.
Shimakawa, Y.
Tanaka, A.
Mizokawa, T.
Kuneš, J.
Tjeng, L. H.
Hariki, A.
Issue Date: 2022
Type: Article
Language: English
Abstract: We present a comprehensive study of CaCu3Ru4O12 using bulk sensitive hard and soft x-ray spectroscopy combined with local-density approximation+dynamical mean-field theory (DMFT) calculations. Correlation effects on both the Cu and Ru ions can be observed. From the Cu 2p core-level spectra, we deduce the presence of magnetic Cu2+ ions hybridized with a reservoir of itinerant electrons. The strong photon energy dependence of the valence band allows us to disentangle the Ru, Cu, and O contributions and, thus, to optimize the DMFT calculations. The calculated spin and charge susceptibilities show that the transition metal oxide CaCu3Ru4O12 must be classified as a Kondo system and that the Kondo temperature is in the range of 500–1000 K.
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: Publikationsfonds MLU
Journal Title: Physical review / X
Publisher: APS
Publisher Place: College Park, Md.
Volume: 12
Issue: 1
Original Publication: 10.1103/PhysRevX.12.011017
Appears in Collections:Open Access Publikationen der MLU

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