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Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO

文献类型：期刊论文

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作者Cheng, J; 储旺盛Chu, WS; Liu, SL; Li, YT; Xu, ZA; Wu, ZY;吴自玉
刊名JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA ; JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
出版日期2014 ; 2014
卷号196期号:SI页码:94-98
关键词XAS Fe-based superconductors Local structure distortion Zn impurity XAS Fe-based superconductors Local structure distortion Zn impurity
ISSN号0368-2048
DOI10.1016/j.elspec.2013.10.001
英文摘要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.; 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.
学科主题Spectroscopy ; Spectroscopy
收录类别SCI
电子版国际标准刊号1873-2526
语种英语
WOS记录号WOS:000345823400020 ; WOS:000345823400020
公开日期2016-05-03
源URL[http://ir.ihep.ac.cn/handle/311005/225078]  
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,储旺盛Chu, WS,Liu, SL,et al. Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO, Charge transfer and local structure distortion in Zn-doped LaFe1-xCoxAsO[J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,2014, 2014,196, 196(SI):94-98, 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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来源：高能物理研究所

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