期刊論文
| 學年 | 108 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2019-10-31 |
| 作品名稱 | Low energy orbital excitations in strained LaCoO3 films |
| 作品名稱（其他語言） | |
| 著者 | Ru-Pan Wang; Jaap Geessinck; Hebatalla Elnaggar; Keisuke Tomiyasu; Jun Okamoto; Boyang Liu; Chao-Hung Du; Di-Jing Huang; Gertjan Koster,; Frank M. F. de Groot |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Phys. Rev. B 100(16), 165148 |
| 摘要 | We present 90 meV resolved Co 2p3d resonant inelastic x-ray scattering linear dichroism spectra of strained LaCoO3 films and a LaCoO3 single crystal. A polarization-dependent low-energy excitation is observed at ∼0.2eV on the tensile-strained LaCoO3/SrTiO3 film, while it is not observed in either bulk LaCoO3 or the compressive-strained LaCoO3/LaAlO 3 film. Guided by cluster calculations, we are able to distinguish the spin-state manifolds close to their transition point of Co3+ ions in LaCoO3 systems. Through a polarization analysis, we show that the spin state can easily flip from a low-spin 1A1g state in an octahedral symmetry to the high-spin 5B2g or 5Eg states with a small tetragonal distortion. A mixture of spin states suggests that the high-spin Co3+ plays an important role in long-range ferromagnetic order on both tensile- and compressive-strained LaCoO3 films. |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | 1550-235X |
| 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 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118828 ) |