Synchrotron radiation photoemission study of Yb2.75C60
文献类型：期刊论文
| 作者 | He, SL; Li, HN; Wang, XX; Li, HY ; Kurash, I; Qian, HJ; Su, R; Abbas, MI; Zhong, J; Hong, CH
|
| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2005 |
| 卷号 | 54期号:3页码:1400-1405 |
| 关键词 | Yb2.75C60 SR-PES photoionization cross section oscillation |
| 通讯作者 | Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Lab Synchrotron Radiat, Beijing 100039, Peoples R China |
| 英文摘要 | The Yb-2.75 C-60 thin film was prepared and studied by using the synchrotron radiation ultraviolet photoemission spectroscopy (PES) in an ultra-high-vacuum system. The spectral line obtained in the range between the Fermi level and similar to 5 eV binding energy consists of those lines from the valence band (the molecular orbital LUMO, HOMO and HOMO-1 derived energy bands of C-60) and core levels(Yb 4f(7/2) and 4f(5/2)). Taking into account the variations of the photoinization cross sections of C 2p and Yb 4f with different photon energies, we have measured the photoemission spectra under the condition of varying photon energies, and carried out simulations to deduce the component contributions. The peak positions, widths and intensities for the components are obtained quantitatively. The results reveals that the photoemission of 4f electrons has a significant intensity with the photon energies larger than similar to 30.0 eV, and that the measured spectra depart drastically from the density of states of the valence band. To observe the valence band structure, one should carry out the PES measurements by using photons with energies less than 30.0 eV. The photoionization cross-section oscillation is also observed in Yb2.75C60 with almost the same oscillation period as that for pure C-60. However, the oscillation amplitude is obviously smaller than that for pure C-60, which reveals that the chemical environment of C-60 in compounds has non-negligible effects on the photoionization cross-section oscillation phenomenon. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000227786300070 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239340]  |
| 专题 | 高能物理研究所_加速器中心 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | He, SL,Li, HN,Wang, XX,et al. Synchrotron radiation photoemission study of Yb2.75C60[J]. ACTA PHYSICA SINICA,2005,54(3):1400-1405. |
| APA | He, SL.,Li, HN.,Wang, XX.,Li, HY.,Kurash, I.,...&洪才浩.(2005).Synchrotron radiation photoemission study of Yb2.75C60.ACTA PHYSICA SINICA,54(3),1400-1405. |
| MLA | He, SL,et al."Synchrotron radiation photoemission study of Yb2.75C60".ACTA PHYSICA SINICA 54.3(2005):1400-1405. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。