|
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 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2000/06 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | High-resolution angle-resolved photoemission study of USb: Dual character of 5f electrons |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW B |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 61(23),pp.15707-15713 |
| 著者・共著者 | H Kumigashira,T Ito,A Ashihara,HD Kim,H Aoki,T Suzuki,H Yamagami,T Takahashi,A Ochiai |
| 概要 | We have performed a high-resolution angle-resolved photoemission spectroscopy (ARPES) on antiferromagnetic USb to study the electronic structure near the Fermi level. We found that USb has a metallic band structure with the fully occupied Sb 5p bands in contrast to semimetallic CeSb that has the partially filled Sb 5p bands. This suggests that the magnetic phase transition of USb is not understood within the framework of the p-f mixing model. This difference in the electronic structure between USb and CeSb is ascribed to the energy position of the respective bare f level with respect to the Sb 5p band. The observed fully occupied Sb 5p bands in USb is consistent with the band calculation based on the itinerant U 5f model, but different from that of the localized model. On the other hand, we found two dispersionless bands just below E-F in ARPES spectra of USb, which are well described in terms of the 5f(2)-final-state multiplet structure calculated based on the localized 5f model. These experimental results suggest the dual (itinerant and localized) character of 5f electrons that characterizes anomalous properties of USb. |
| DOI | 10.1103/PhysRevB.61.15707 |
| ISSN | 1098-0121/1550-235X |