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ヤマガミ ヒロシ
YAMAGAMI HIROSHI
山上 浩志 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2023/11 |
| 形態種別 | 研究論文 |
| 標題 | Impact of the Ce 4f states in the electronic structure of the intermediate-valence superconductor CeIr3 |
| 執筆形態 | その他 |
| 掲載誌名 | Electronic Structure |
| 出版社・発行元 | IOP Publishing |
| 巻・号・頁 | 5(4),045009-045009頁 |
| 著者・共著者 | Shin-ichi Fujimori,Ikuto Kawasaki,Yukiharu Takeda,Hiroshi Yamagami,Norimasa Sasabe,Yoshiki J Sato,Ai Nakamura,Yusei Shimizu,Arvind Maurya,Yoshiya Homma,Dexin Li,Fuminori Honda,Dai Aoki |
| 概要 | Abstract
The electronic structure of the f-based superconductor $\mathrm{CeIr_3}$ was studied by photoelectron spectroscopy. The energy distribution of the $\mathrm{Ce}~4f$ states were revealed by the $\mathrm{Ce}~3d-4f$ resonant photoelectron spectroscopy. The $\mathrm{Ce}~4f$ states were mostly distributed in the vicinity of the Fermi energy, suggesting the itinerant character of the $\mathrm{Ce}~4f$ states. The contribution of the $\mathrm{Ce}~4f$ states to the density of states (DOS) at the Fermi energy was estimated to be nearly half of that of the $\mathrm{Ir}~5d$ states, implying that the $\mathrm{Ce}~4f$ states have a considerable contribution to the DOS at the Fermi energy. The $\mathrm{Ce}~3d$ core-level and $\mathrm{Ce}~3d$ x-ray absorption spectra were analyzed based on a single-impurity Anderson model. The number of the $\mathrm{Ce}~4f$ states in the ground state was estimated to be $0.8-0.9$, which is much larger than the values obtained in the previous studies (i.e. $0-0.4$). |
| DOI | 10.1088/2516-1075/ad0a3d |
| ISSN | /2516-1075 |
| PermalinkURL | https://iopscience.iop.org/article/10.1088/2516-1075/ad0a3d |
| researchmap用URL | https://iopscience.iop.org/article/10.1088/2516-1075/ad0a3d/pdf |