Correlation effects in CaCu3Ru4O12
N. Hollmann, Z. Hu, A. Maignan, A. G\"unther, L.-Y. Jang, A. Tanaka,, H.-J. Lin, C. T. Chen, P. Thalmeier, L. H. Tjeng
TL;DR
This study investigates the electronic structure of CaCu3Ru4O12 and LaCu3Ru4O12, revealing strong correlation effects in Cu 3d states and the itinerant nature of Ru, using advanced spectroscopic techniques and theoretical calculations.
Contribution
It provides new insights into the correlation effects and electronic states in CaCu3Ru4O12, highlighting the role of Cu and Ru in stabilizing metallic behavior.
Findings
Cu is in a divalent ionic state
Ru exhibits itinerant character stabilizing metallicity
Strong correlation effects observed in Cu 3d states
Abstract
We have investigated the electronic structure of CaCu3Ru4O12 and LaCu3Ru4O12 using soft x-ray photoelectron and absorption spectroscopy together with band structure and cluster configuration interaction calculations. We found the Cu to be in a robust divalent ionic state while the Ru is more itinerant in character and stabilizes the metallic state. Substitution of Ca by La predominantly affects the Ru states. We observed strong correlation effects in the Cu 3d states affecting the valence band line shape considerably. Using resonant photoelectron spectroscopy at the Cu L3 edge we were able to unveil the position of the Zhang-Rice singlet states in the one-electron removal spectrum of the Cu with respect to the Ru-derived metallic bands in the vicinity of the chemical potential.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.