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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 | 2008/11 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | de Haas-van Alphen Effect in LaFePO with Two-Dimensional Cylindrical Fermi Surfaces |
| 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 | 77(11) |
| 著者・共著者 | Hitoshi Sugawara,Rikio Settai,Yusuke Doi,Hiroshi Muranaka,Keisuke Katayama,Hiroshi Yamagami,Yoshichika Onuki |
| 概要 | We have Succeeded in observing the de Haas-van Alphen (dHvA) effect in LaFePO. the first reported iron-based superconductor in the iron-oxypnictide family. The four detected dHvA frequencies, which correspond to the cross-sectional areas of Fermi surfaces, approximately follow the 1/cos theta dependence,, where theta is the field-tilted angle from the [001] direction to the [100] and [110] directions in the tetragonal structure. This indicates that all the Fermi surfaces are nearly cylindrical, with the two-dimensional electronic state. The cyclotron effective mass, which was determined from the temperature dependence of the dHvA amplitude, is relatively large, ranging from 1.82 to 2.34m(0). The result of energy band structure calculation revealed that the conduction bands mainly consist of 3d electrons of Fe atoms. |
| DOI | 10.1143/JPSJ.77.113711 |
| ISSN | 0031-9015 |