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arXiv · 2409.04062

Correlated Ligand Electrons in the Transition-Metal Oxide SrRuO$_3$

Yuichi Seki·Yuki K. Wakabayashi·Takahito Takeda·Kohdai Inagaki·Shin-ichi Fujimori·Yukiharu Takeda·Atsushi Fujimori·Yoshitaka Taniyasu·Hideki Yamamoto·Yoshiharu Krockenberger·Masaaki Tanaka·Masaki Kobayashi
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Abstract

In transition-metal compounds, the transition-metal d electrons play an important role in their physical properties; however, the effects of the electron correlation between the ligand p electrons have not been clear yet. In this Letter, the Ru 4d and O 2p partial density of states (PDOS) in transition-metal oxide SrRuO$_3$ involving Weyl fermions are investigated by resonant photoemission spectroscopy. The observations demonstrate that the O 2p PDOS is distorted from that predicted by first-principles calculations than the Ru 4d PDOS. The results indicate that the electron correlation in the ligand orbitals will be important to understand the electronic structure of the p-d hybridized state in strongly correlated electron systems, even with topological states.

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Yuichi Seki, Yuki K. Wakabayashi, Takahito Takeda, Kohdai Inagaki, Shin-ichi Fujimori, Yukiharu Takeda, Atsushi Fujimori, Yoshitaka Taniyasu, Hideki Yamamoto, Yoshiharu Krockenberger, Masaaki Tanaka, Masaki Kobayashi. 2024-09-06. Correlated Ligand Electrons in the Transition-Metal Oxide SrRuO$_3$. https://doi.org/10.1103/n9qh-6739

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