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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 | 2019/07/15 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Electronic structure of the high-T-C ferromagnetic semiconductor (Ga,Fe)Sb: X-ray magnetic circular dichroism and resonance photoemission spectroscopy studies |
| 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 | 100(3) |
| 著者・共著者 | Shoya Sakamoto,Nguyen Thanh Tu,Yukiharu Takeda,Shin-ichi Fujimori,Pham Nam Hai,Le Duc Anh,Yuki K. Wakabayashi,Goro Shibata,Masafumi Horio,Keisuke Ikeda,Yuji Saitoh,Hiroshi Yamagami,Masaaki Tanaka,Atsushi Fujimori |
| 概要 | The electronic structure and the magnetism of the ferromagnetic semiconductor (Ga,Fe)Sb, whose Curie temperature T-C can exceed room temperature, were investigated by means of x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD), and resonance photoemission spectroscopy (RPES). The line-shape analyses of the XAS and XMCD spectra suggest that the ferromagnetism is of intrinsic origin. The orbital magnetic moments deduced using XMCD sum rules were found to be large, indicating that there is a considerable 3d(6) contribution to the ground state of Fe. From RPES, we observed a strong dispersive Auger peak and nondispersive resonantly enhanced peaks in the valence-band spectra. The latter is a fingerprint of the correlated nature of Fe 3d electrons, whereas the former indicates their itinerant nature. It was also found that the Fe 3d states have a finite contribution to the density of states at the Fermi energy. These states, presumably consisting of majority-spin p-d hybridized states or minority-spin e states, would be responsible for the ferromagnetic order in this material. |
| DOI | 10.1103/PhysRevB.100.035204 |
| ISSN | 2469-9950/2469-9969 |
| PermalinkURL | https://link.aps.org/accepted/10.1103/PhysRevB.100.035204 |
| researchmap用URL | https://link.aps.org/article/10.1103/PhysRevB.100.035204 |