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

	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
刊名	JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
	2014
卷号	196 期号:SI 页码:94-98
关键词	XAS Fe-based superconductors Local structure distortion Zn impurity
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.
学科主题	Spectroscopy
收录类别	SCI
WOS记录号	WOS:000345823400020
公开日期	2016-05-03
内容类型	期刊论文
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[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.