Role of local structure distortion in the suppression of superconductivity for Eu3-xSrxBi2S4F4 system

doi:10.1016/j.jallcom.2018.01.410

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Role of local structure distortion in the suppression of superconductivity for Eu3-xSrxBi2S4F4 system
	Cheng, J ; Zhang, P ; Dong, P ; Wang, XF ; Wang, Y ; Li, X ; Liu, SL ; Li, YK ; Xu, Z
	2018
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	743 页码:547-552
文章类型	期刊论文
摘要	As new family of superconductors with a layered structure, BiS2-based materials have attracted much interest. Eu3Bi2S4F4 is a newly discovered member which shows superconductivity at 1.5 K without extrinsic doping, however, superconductivity is strongly suppressed by Sr-doping. In this contribution, we present, in terms of local atomic displacement, an insight into the relationship between Sr-doping and the suppression of superconductivity in Eu3-xSrxBi2S4F4 by Bi and Eu L-3-edge X-ray absorption spectroscopy. Upon Sr-doping, the distance between Eu3F4 blocking layers and BiS2 layers is significantly elongated, accompanied by the breaking of Eu-S-Bi channel, which makes it more difficult to transfer electrons into BiS2 layers. Moreover, distortions in the Bi-S-1 plane increase with Sr content, reducing the overlap among Bi(6p(x)/6p(y))-S(3p) orbitals within the superconducting plane. The decoupling between blocking and BiS2 layers, as well as the distortions in the superconducting Bi-S-1 plane, may contribute to the suppression of superconductivity in Sr-doped Eu3Bi2S4F4 compounds. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Ray-absorption Spectroscopy Near-edge Structure Liii-absorption Valence Eu
DOI	10.1016/j.jallcom.2018.01.410
收录类别	SCI
语种	英语
WOS记录号	WOS:000427511200062
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/29124
专题	中科院上海应用物理研究所2011-2018年
作者单位	1.Cheng, J 2.Zhang, P 3.Dong, P 4.Wang, XF 5.Wang, Y 6.Li, X 7.Liu, SL 8.Li, YK 9.Xu, Z
推荐引用方式 GB/T 7714	Cheng, J,Zhang, P,Dong, P,et al. Role of local structure distortion in the suppression of superconductivity for Eu3-xSrxBi2S4F4 system[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,743:547-552.
APA	Cheng, J.,Zhang, P.,Dong, P.,Wang, XF.,Wang, Y.,...&Xu, Z.(2018).Role of local structure distortion in the suppression of superconductivity for Eu3-xSrxBi2S4F4 system.JOURNAL OF ALLOYS AND COMPOUNDS,743,547-552.
MLA	Cheng, J,et al."Role of local structure distortion in the suppression of superconductivity for Eu3-xSrxBi2S4F4 system".JOURNAL OF ALLOYS AND COMPOUNDS 743(2018):547-552.

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