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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; Huang, YY; Wu, Q; Dai, X; Li, YC; Liu, J; Zhao, ZX; Li YC(李延春); Liu J(刘景)
2010
发表期刊PHYSICAL REVIEW B
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
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.
文章类型Article
学科领域Physics
研究领域[WOS]Physics
DOI10.1103/PhysRevB.82.134509
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语种英语
WOS类目Physics, Condensed Matter
WOS记录号WOS:000282634200004
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被引频次:76[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/311005/240998
专题多学科研究中心
实验物理中心
加速器中心
核技术应用研究中心
作者单位中国科学院高能物理研究所
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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.
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