Charge redistribution and a shortening of the Fe-As bond at the quantum critical point of SmO1- xFxFeAs
文献类型：期刊论文
| 作者 | Cheng, J; Dong, P; Xu, W; Liu, SL; Chu, WS; Chen, XH; Wu, ZY; Chu WS(储旺盛) ; Wu ZY(吴自玉)
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| 刊名 | JOURNAL OF SYNCHROTRON RADIATION
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| 出版日期 | 2015 |
| 卷号 | 22页码:1030-1034 |
| 关键词 | quantum critical point iron-based superconductor XAS electronic structure local structure |
| 英文摘要 | Many researchers have pointed out that there is a quantum critical point (QCP) in the F-doped SmOFeAs system. In this paper, the electronic structure and local structure of the superconductive FeAs layer in SmO1-xFxFeAs as a function of the F-doping concentration have been investigated using Fe and As K-edge X-ray absorption spectroscopy. Experiments performed on the X-ray absorption near-edge structure showed that in the vicinity of the QCP the intensity of the pre-edge feature at the Fe-edge decreases continuously, while there is a striking rise of the shoulder-peak at the As edge, suggesting the occurrence of charge redistribution near the QCP. Further analysis on the As K-edge extended X-ray absorption fine structure demonstrated that the charge redistribution originates mostly from a shortening of the Fe-As bond at the QCP. An evident relationship between the mysterious QCP and the fundamental Fe-As bond was established, providing new insights on the interplay between QCP, charge dynamics and the local structural Fe-As bond in Fe-based superconductors. |
| 学科主题 | Instruments & Instrumentation; Optics; Physics |
| 类目[WOS] | Instruments & Instrumentation ; Optics ; Physics, Applied |
| 收录类别 | SCI ; EI |
| WOS记录号 | WOS:000357407900019 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228618]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Cheng, J,Dong, P,Xu, W,et al. Charge redistribution and a shortening of the Fe-As bond at the quantum critical point of SmO1- xFxFeAs[J]. JOURNAL OF SYNCHROTRON RADIATION,2015,22:1030-1034. |
| APA | Cheng, J.,Dong, P.,Xu, W.,Liu, SL.,Chu, WS.,...&吴自玉.(2015).Charge redistribution and a shortening of the Fe-As bond at the quantum critical point of SmO1- xFxFeAs.JOURNAL OF SYNCHROTRON RADIATION,22,1030-1034. |
| MLA | Cheng, J,et al."Charge redistribution and a shortening of the Fe-As bond at the quantum critical point of SmO1- xFxFeAs".JOURNAL OF SYNCHROTRON RADIATION 22(2015):1030-1034. |
入库方式： OAI收割
来源：高能物理研究所
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