La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy
文献类型：期刊论文
| 作者 | Cheng, J; Sun, XY; Liu, SL; Li, B; Wang, HY; Dong, P; Wang, Y; Xu, W |
| 刊名 | NEW JOURNAL OF PHYSICS
 |
| 出版日期 | 2016 |
| 卷号 | 18页码:- |
| 关键词 | 5d transition metal oxides spin-orbit interaction crystal electric field XAS |
| ISSN号 | 1367-2630 |
| 通讯作者 | Cheng, J ; Liu, SL ; Li, B (reprint author), Nanjing Univ Posts & Telecommun, Coll Sci, Ctr Adv Funct Ceram, Nanjing 210023, Jiangsu, Peoples R China. ; Liu, SL (reprint author), Nanjing Univ, Suzhou High Tech Inst, Suzhou 215123, Peoples R China. |
| 英文摘要 | Sr2IrO4 was predicted to be an unconventional superconductor upon carrier doping since it highly resembles the high-temperature cuprates. Here, to understand carrier doping effect on spin-orbit coupled Mott insulator Sr2IrO4, the electronic structure and local structure distortion for Sr2-xLaxIrO4 system have been investigated by x-ray absorption spectroscopy. By comparing the intensity of white-line features at the Ir L-2,L-3 absorption edges, we observe remarkably large branching ratios in La-doped compounds, greater than that of the parent material Sr2IrO4, suggesting a strong spin-orbit interaction for Sr2IrO4-based system. Moreover, extended x-ray absorption fine structure spectra demonstrate more regular IrO6 octahedra, i.e. the weakened crystal electric field versus La-doping. By theoretical calculations, the synergistic effect of regular IrO6 octahedra and electron doping is established, which accounts for the transition from a Mott insulator to a conductive state in Sr2-xLaxIrO4-based system. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000384093400004 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/26557]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Cheng, J,Sun, XY,Liu, SL,et al. La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy[J]. NEW JOURNAL OF PHYSICS,2016,18:-. |
| APA | Cheng, J.,Sun, XY.,Liu, SL.,Li, B.,Wang, HY.,...&Xu, W.(2016).La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy.NEW JOURNAL OF PHYSICS,18,-. |
| MLA | Cheng, J,et al."La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy".NEW JOURNAL OF PHYSICS 18(2016):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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