Valence change of europium in EuFe2As1.4P0.6 and compressed EuFe2As2 and its relation to superconductivity

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	Valence change of europium in EuFe2As1.4P0.6 and compressed EuFe2As2 and its relation to superconductivity
	Sun, LL; Guo, J; Chen, GF; Chen, XH; Dong, XL; Lu, W; Zhang, C; Jiang, Z; Zou, Y; Zhang, S
刊名	PHYSICAL REVIEW B
	2010
卷号	82 期号:13 页码:134509
通讯作者	[Sun, Liling ; Guo, Jing ; Dong, Xiaoli ; Lu, Wei ; Zhang, Chao ; Wu, Qi ; Dai, Xi ; Zhao, Zhongxian] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China ; [Sun, Liling ; Guo, Jing ; Dong, Xiaoli ; Lu, Wei ; Zhang, Chao ; Wu, Qi ; Dai, Xi ; Zhao, Zhongxian] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China ; [Chen, Genfu] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China ; [Chen, Xianhui] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China ; [Chen, Xianhui] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China ; [Jiang, Zheng ; Zou, Yang ; Zhang, Suo ; Huang, Yuying] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China ; [Li, Yuanchun ; Liu, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing 100190, Peoples R China
英文摘要	Superconductivity can be realized in Eu-containing pnictides by applying chemical (internal) and physical (external) pressure, the intrinsic physical mechanism of which attracts much attention in the studies of pnictide superconductors. Here we present the experimental evidence for the pressure-induced valence change of europium in EuFe2As1.4P0.6 exposed to ambient pressure and EuFe2As2 to high pressure by x-ray absorption measurements on L-3-Eu edge. We found that the absorption spectrum of EuFe2As1.4P0.6 showed a clear spectra weight transfer from divalent to trivalent state. Furthermore, a similar behavior of valence transition as in EuFe2As1.4P0.6 was also observed in EuFe2As2 when pressure was applied. This reports the observation of valence change in pnictide superconductors and the analysis of its influence on superconductivity in EuFe2As1.4P0.6 and compressed EuFe2As2.
学科主题	Physics
类目[WOS]	Physics, Condensed Matter
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000282634200004
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240998]
专题	高能物理研究所_核技术应用研究中心高能物理研究所_实验物理中心高能物理研究所_加速器中心高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Sun, LL,Guo, J,Chen, GF,et al. Valence change of europium in EuFe2As1.4P0.6 and compressed EuFe2As2 and its relation to superconductivity[J]. PHYSICAL REVIEW B,2010,82(13):134509.
APA	Sun, LL.,Guo, J.,Chen, GF.,Chen, XH.,Dong, XL.,...&刘景.(2010).Valence change of europium in EuFe2As1.4P0.6 and compressed EuFe2As2 and its relation to superconductivity.PHYSICAL REVIEW B,82(13),134509.
MLA	Sun, LL,et al."Valence change of europium in EuFe2As1.4P0.6 and compressed EuFe2As2 and its relation to superconductivity".PHYSICAL REVIEW B 82.13(2010):134509.