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Electron Transfer and Local Atomic Displacement in Sr1-xCexFBiS2 Revealed by X-ray Absorption Spectroscopy
Cheng, J; Yang, YS; Li, YK; Dong, P; Wang, Y; Liu, SL
2017
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume121Issue:15Pages:8525-8530
Subtype期刊论文
AbstractSuperconductivity in quasi-two-dimensional crystal Structures has attracted sustained interest among condensed matter community, primarily due to their exotic superconducting properties. Recently, superconductivity of BiS2-based compounds with the desired layered crystal structure has been reported. In this contribution, Ce-doping effect on-the electronic structure and local atomic displacement of Sr1-xCexFBiS2 was investigated by Ce and Bi L-3-edge X-ray absorption spectroscopy. Upon Ce-doping both the Ce-S2 and Bi-S2 bonds shrink, enhancing the coupling between Sr/CeF and super-conducting BiS2 layers. Therefore, Ce substitution provides electron carriers to the superconducting BiS2 layers through the enhanced Ce-S2-Bi channel. On the other hand, Ce-doping effectively modulates the in-plane structure of Bi-S1 plane. In Ce-doped compounds both the shortening of in-plane Bi-S1 bond and the flatter Bi-S1 plane would enhance overlap of Bi(6p(x)/6p(y))-S(3p) orbitals within the superconducting plane. Therefore, Ce-doping not only provides the electron carriers to superconducting BiS2 layers, but also results in the flatter Bi-S1 plane. This may be related to the enhancement of superconductivity in Ce-doped SrFBiS2 compounds.
DOI10.1021/acs.jpcc.7b01479
Indexed BySCI
Language英语
WOS IDWOS:000400039300033
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/27309
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Cheng, J,Yang, YS,Li, YK,et al. Electron Transfer and Local Atomic Displacement in Sr1-xCexFBiS2 Revealed by X-ray Absorption Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(15):8525-8530.
APA Cheng, J,Yang, YS,Li, YK,Dong, P,Wang, Y,&Liu, SL.(2017).Electron Transfer and Local Atomic Displacement in Sr1-xCexFBiS2 Revealed by X-ray Absorption Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C,121(15),8525-8530.
MLA Cheng, J,et al."Electron Transfer and Local Atomic Displacement in Sr1-xCexFBiS2 Revealed by X-ray Absorption Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C 121.15(2017):8525-8530.
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