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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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| 言語種別 | 英語 |
| 発行・発表の年月 | 1992 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | BAND THEORY OF ITINERANT F-ELECTRON COMPOUNDS |
| 執筆形態 | その他 |
| 掲載誌名 | PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT |
| 出版社・発行元 | PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE |
| 巻・号・頁 | 108(108),pp.27-54 |
| 著者・共著者 | A HASEGAWA,H YAMAGAMI |
| 概要 | Recent progress of band theory for the Fermi surface in the Ce and the U compounds is reported. A symmetrized relativistic APW method has been completed and applied to some compounds in which the de Haas-van Alphen effect (dHvA) has recently been measured. The exchange and correlation interaction of electrons are taken into account within the framework of the local-density approximation. On the basis of the itinerant-electron model for the 4f electrons, it has been revealed that the origins of the major dHvA frequency branches observed in the valence-fluctuating compound CeSn3 can be clarified reasonably well by band theory. The experimental results for another valence-fluctuating compound CeNi can be explained well also, though the agreement between theory and experiment is not so good as for CeSn3, perhaps because of limitations of the muffin-tin potential shape approximation used. On the basis of the itinerant-electron model for the 5f electrons, the origins of the major dHvA frequency branches observed in UC and UB12 have been clarified satisfactorily well. In contrast to the shape of the Fermi surface, the heavy cyclotron effective masses observed in all these compounds except UB12 cannot be explained by the band structure alone. Theoretical results for related materials such as LaSn3, LaNi, Th and alpha-U are also reported. |
| ISSN | 0375-9687 |