期刊論文
| 學年 | 99 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2011-02-01 |
| 作品名稱 | X-ray absorption spectroscopy investigation of the electronic structure of superconducting FeSex single crystals |
| 作品名稱（其他語言） | |
| 著者 | Chen, C. L.; Rao, S. M.; Dong, C. L.; Chen, J. L.; Huang, T. W.; Mok, B. H.; Ling, M. C.; Wang, W. C.; Chang, C. L.; Chan, T. S.; Lee, J. F.; Guo, J. H.; Wu, M. K. |
| 單位 | 淡江大學物理學系 |
| 出版者 | Les Ulis: E D P Sciences |
| 著錄名稱、卷期、頁數 | Europhysics Letters 93(4), 47003(5pages) |
| 摘要 | X-ray absorption spectroscopy (XAS) Fe K-edge spectra of the FeSex (x=1–0.8) single crystals cleaved in situ under vacuum reveal characteristic Fe 4sp states and a lattice distortion. The Se K-edge spectra point to a strong Fe 3d-Se 4p hybridization giving rise to itinerant charge carriers. A formal charge of ~1.8+ for Fe and ~2.2− for Se was evaluated from these spectra in the FeSex (x=0.88). The charge balance between Fe and Se is assigned to itinerant electrons located in the Fe-Se hybridization bond. As x decreases the 4p hole count increases and a crystal structure distortion is observed that in turn causes the Fe separation in the ab-plane change from 4p orbital to varying (modulating) coordination. Powder X-ray diffraction (XRD) measurements also show a slight increase in lattice parameters as x decreases (increasing Se deficiency). |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0295-5075 1286-4854 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Chen, C. L.; Rao, S. M. |
| 審稿制度 | |
| 國別 | FRA |
| 公開徵稿 | |
| 出版型式 | 紙本 電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/58311 ) |