|
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 | 1999/06 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Electronic structure and fermi surface for LaNi2Ge2 and CeNi2Ge2 |
| 執筆形態 | その他 |
| 掲載誌名 | JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN |
| 出版社・発行元 | PHYSICAL SOC JAPAN |
| 巻・号・頁 | 68(6),pp.1975-1981 |
| 著者・共著者 | H Yamagami |
| 概要 | Ab-initio calculations of the electronic structure for non-magnetic heavy-fermion cerium compound CeMi(2)Ge(2) and the reference material LaNi2Ge2 have been performed by an all-electron fully-relativistic augmented-plane-wave (RLAPW) method with an exchange-correlation potential in a local-density approximation. The Fermi surfaces for the two compounds are calculated to investigate a dependence of 4f electrons in the bands near the Fermi energy. The obtained Fermi surface of LaNi2Ge2 can account well for origins of the branches observed by the de Haas-van Alphen (dHvA) effect. The calculated cyclotron mass for the dHvA branches is quantitatively comparable with the observed one; corresponding to a small enhancement factor estimated from the electronic specific heat coefficient. In order to elucidate theoretically-predicted dHvA branches for CeNi2Ge2, the dHvA frequencies along the symmetry axes are calculated together with the cyclotron mass. |
| DOI | 10.1143/JPSJ.68.1975 |
| ISSN | 0031-9015 |