期刊論文
| 學年 | 105 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2017-03-13 |
| 作品名稱 | Anisotropy in the thermal hysteresis of resistivity and charge density wave nature of single crystal SrFeO3-δ: X-ray absorption and photoemission studies |
| 作品名稱（其他語言） | |
| 著者 | Shang Hsien Hsieh; R.S. Solanki; Y. F. Wang; Y. C. Shao; Shu-Han Lee; C.H. Yao; Chao-Hung Du; H.T. Wang; J. W. Chiou; Y.Y. Chin; H. M. Tsai; Jeng-Lung Chen; Chih-Wen Pao; Cheng-Maw Cheng; Wei-Chuan Chen; Hong-Ji Lin; Jyh-Fu Lee; Fang-Cheng Chou; Way-Faung Pong |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Scientific Reports 7, 161(11pages) |
| 摘要 | The local electronic and atomic structures of the high-quality single crystal of SrFeO3-δ (δ~0.19) were studied using temperature-dependent x-ray absorption and valence-band photoemission spectroscopy (VB-PES) to investigate the origin of anisotropic resistivity in the ab-plane and along the c-axis close to the region of thermal hysteresis (near temperature for susceptibility maximum, Tm~78 K). All experiments herein were conducted during warming and cooling processes. The Fe L 3,2-edge X-ray linear dichroism results show that during cooling from room temperature to below the transition temperature, the unoccupied Fe 3d e g states remain in persistently out-of-plane 3d 3z2-r2 orbitals. In contrast, in the warming process below the transition temperature, they change from 3d 3z2-r2 to in-plane 3d x2-y2 orbitals. The nearest-neighbor (NN) Fe-O bond lengths also exhibit anisotropic behavior in the ab-plane and along the c-axis below Tm. The anisotropic NN Fe-O bond lengths and Debye-Waller factors stabilize the in-plane Fe 3d x2-y2 and out-of-plane 3d 3z2-r2 orbitals during warming and cooling, respectively. Additionally, a VB-PES study further confirms that a relative band gap opens at low temperature in both the ab-plane and along the c-axis, providing the clear evidence of the charge-density-wave nature of SrFeO3-δ (δ~0.19) single crystal. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 2045-2322 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | 國外 |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/110122 ) |