期刊論文
| 學年 | 76 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 1988-04-01 |
| 作品名稱 | Effect of Sm valence changes on photoemission spectra |
| 作品名稱（其他語言） | |
| 著者 | denBoer, M. L.; Chang, C.L.; Horn, S.; Murgai, V. |
| 單位 | 淡江大學物理學系 |
| 出版者 | College Park: American Physical Society |
| 著錄名稱、卷期、頁數 | Physical Review B (Condensed Matter) 37(12), pp.6605-6610 |
| 摘要 | We have used low-energy (hν=17–45 eV) photoemission to study thin films of Sm evaporated on Nb. We find that Sm evaporated onto a room-temperature Nb substrate is initially entirely divalent. On a time scale of the order of 50 min at room temperature a valence transition to mixed-valent or trivalent Sm occurs. This is accompanied by dramatic changes in the photoemission spectra, including a large increase in the total yield of photoelectrons and the appearance of a series of new constant-kinetic-energy peaks. The photon-energy dependence of these peaks indicates that they are due to Auger recombination of the Sm 5p level. We also observe a 5p→5d resonance in Sm for the first time. The underlying cause of these effects appears to be an ordering transition in the Sm film, which changes the Sm 5d occupancy and increases the resonance amplitude. This mechanism is evidently a very sensitive indicator of a Sm valence change. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1095-3795 0163-1829 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | USA |
| 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/987654321/72590 ) |