Abstract：
:Superconductivity within layered crystal structures has attracted sustained interest among condensed matter community, primarily due to their exotic superconducting properties. EuBiS2F is a newly discovered member in the BiS2-based superconducting family, which shows superconductivity at 0.3 K without extrinsic doping. With 50 at.% Ce substitution for Eu, superconductivity is enhanced with Tc increased up to 2.2 K. However, the mechanisms for the Tc enhancement have not yet been elucidated. In this study, the Ce-doping effect on the self-electron-doped superconductor EuBiS2F was investigated by X-ray absorption spectroscopy (XAS). We have established a relationship between Ce-doping and the Tc enhancement in terms of Eu valence changes and nanoscale atomic displacements. The new finding sheds light on the interplay among superconductivity, charge and local structure in BiS2-based superconductors.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Cheng J,Zhai H,Wang Y,Xu W,Liu S,Cao Gdoi
10.1038/srep37394subject
Has Abstractpub_date
2016-11-22 00:00:00pages
37394issn
2045-2322pii
srep37394journal_volume
6pub_type
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