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Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO
Cheng, J; 储旺盛Chu, WS; Liu, SL; Li, YT; Xu, ZA; Wu, ZY;吴自玉
2014
发表期刊JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
卷号196期号:SI页码:94-98
摘要To understand the significant suppression of the superconducting transition temperature T-c by nonmagnetic Zn impurity, Zn doping effect on the electronic structure and local structure distortion for the superconductor LaFe1-x-yCoxZnyAsO have been investigated by X-ray absorption spectroscopy (XAS). Fe and As K-edge X-ray absorption near-edge spectroscopy (XANES) point out the charge distribution between Fe and As atoms in the presence of Zn impurities. Moreover, doping by Zn impurities the local lattice structure is finely modulated probed by Fe and As extend X-ray absorption fine structure (EXAFS). With Zn doping the Fe-As bond is rigid, while the distance of Fe-Fe pairs increases. That leads to a more distorted FeAs4 tetrahedron in the presence of Zn impurities. Therefore, in LaFe1-x-yCoxZnyAsO system the severe suppression of T-c by Zn impurity is mostly associated with the more distorted FeAs4 tetrahedron. (C) 2013 Elsevier B.V. All rights reserved.
关键词XAS Fe-based superconductors Local structure distortion Zn impurity
学科领域Spectroscopy
DOI10.1016/j.elspec.2013.10.001
收录类别SCI
WOS记录号WOS:000345823400020
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225078
专题多学科研究中心
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GB/T 7714
Cheng, J,储旺盛Chu, WS,Liu, SL,et al. Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO[J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,2014,196(SI):94-98.
APA Cheng, J,储旺盛Chu, WS,Liu, SL,Li, YT,Xu, ZA,&Wu, ZY;吴自玉.(2014).Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO.JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,196(SI),94-98.
MLA Cheng, J,et al."Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO".JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 196.SI(2014):94-98.
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