2025-07-30 東京大学
機能性酸化物SrRuO3における各電子軌道の伝導電子
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2025-07-30-003
- https://www.t.u-tokyo.ac.jp/hubfs/press-release/2025/0730/003/text.pdf
- https://journals.aps.org/prl/abstract/10.1103/n9qh-6739
遷移金属酸化物SrRuO3における相関した配位子電子 Correlated Ligand Electrons in the Transition-Metal Oxide SrRuO3
Yuichi Seki, Yuki K. Wakabayashi, Takahito Takeda, Kohdai Inagaki, Shin-ichi Fujimori, Yukiharu Takeda, Atsushi Fujimori, Yoshitaka Taniyasu, Hideki Yamamoto et al.
Physical Review Letters Published: 25 July, 2025
DOI: https://doi.org/10.1103/n9qh-6739
Abstract
In transition-metal compounds, the transition-metal electrons play an important role in their physical properties; however, the effects of the electron correlation between the ligand electrons have not been clear yet. In this Letter, the Ru 4 and O 2 partial density of states (PDOS) in transition-metal oxide SrRuO3 involving Weyl fermions are investigated by resonant photoemission spectroscopy. The observations demonstrate that the O 2 PDOS is distorted from that predicted by first-principles calculations than the Ru 4 PDOS. The results indicate that the electron correlation in the ligand orbitals will be important to understand the electronic structure of the − hybridized state in strongly correlated electron systems, even with topological states.
