期刊論文
| 學年 | 108 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2019-12-01 |
| 作品名稱 | The effect of orbital-lattice coupling on the electrical resistivity of YBaCuFeO5 investigated by X-ray absorption |
| 作品名稱（其他語言） | |
| 著者 | M. K. Srivastava; X.-S. Qiu; Y. Y. Chin; S. H. Hsieh; Y. C. Shao; Y.-H. Liang; C.-H. Lai; C. H. Du; H. T. Wang; J. W. Chiou; Y. C. Lai, H. M. Tsai; C. W. Pao; H. J. Lin; J. F. Lee; K. Asokan; W. F. Pong |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Scientific Reports , Volume 9, 論文編號18586 |
| 摘要 | Article Open Access Published: 09 December 2019 The effect of orbital-lattice coupling on the electrical resistivity of YBaCuFeO5 investigated by X-ray absorption M. K. Srivastava, X.-S. Qiu, Y. Y. Chin, S. H. Hsieh, Y. C. Shao, Y.-H. Liang, C.-H. Lai, C. H. Du, H. T. Wang, J. W. Chiou, Y. C. Lai, H. M. Tsai, C. W. Pao, H. J. Lin, J. F. Lee, K. Asokan & W. F. Pong Scientific Reports volume 9, Article number: 18586 (2019) Cite this article 755 Accesses 1 Altmetric Metricsdetails Abstract Temperature-dependent X-ray absorption near-edge structures, X-ray linear dichroism (XLD) and extended X-ray absorption fine structure (EXAFS) spectroscopic techniques were used to investigate the valence state, preferred orbital and local atomic structure that significantly affect the electrical and magnetic properties of a single crystal of YBaCuFeO5 (YBCFO). An onset of increase of resistivity at ~180 K, followed by a rapid increase at/below 125 K, is observed. An antiferromagnetic (AFM)-like transition is close to the temperature at which the resistivity starts to increase in the ab-plane and is also observed with strong anisotropy between the ab-plane and the c-axis. The XLD spectra at the Fe L3,2-edge revealed a change in Fe 3d eg holes from the preferential 3dx2−y2 orbital at high temperature (300–150 K) to the 3d3z2−r2 orbital at/below 125 K. The analysis of the Fe K-edge EXAFS data of YBCFO further revealed an unusual increase in the Debye-Waller factor of the nearest-neighbor Fe-O bond length at/below 125 K, suggesting phonon-softening behavior, resulting in the breaking of lattice symmetry, particularly in the ab-plane of Fe-related square pyramids. These findings demonstrate a close correlation between electrical resistivity and coupling of the preferred Fe 3d orbital with lattice distortion of a single crystal of YBCFO. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 2045-2322 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 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/987654321/118908 ) |