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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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| 発行・発表の年月 | 2015/01/01 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | Fermi surface variation of Ce 4f-electrons in hybridization controlled heavy-fermion systems |
| 執筆形態 | その他 |
| 掲載誌名 | Solid State Communications |
| 巻・号・頁 | 209-210,45-48頁 |
| 著者・共著者 | H. J. Im,T. Ito,H. Miyazaki,S. Kimura,Y. S. Kwon,Y. Saitoh,S. I. Fujimori,A. Yasui,H. Yamagami |
| 概要 | © 2015 Elsevier Ltd. All rights reserved. Ce 3d-4f resonant angle-resolved photoemission measurements on CeCoGe1.2Si0.8 and CeCoSi2 have been performed to understand the Fermi surface topology as a function of hybridization strength between Ce 4f- and conduction electrons in heavy-fermion systems. We directly observe that the hole-like Ce 4f-Fermi surfaces of CeCoSi2 is smaller than that of CeCoGe1.2Si0.8, indicating the evolution of the Ce 4f-Fermi surface with the increase of the hybridization strength. In comparison with LDA calculation, the Fermi surface variation cannot be understood even though the overall electronic structure is roughly explained, indicating the importance of strong correlation effects. |
| DOI | 10.1016/j.ssc.2015.03.005 |
| ISSN | 0038-1098 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84925400718&origin=inward |