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Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex

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arxiv 1701.07575 v1 pith:NMUZTECW submitted 2017-01-26 cond-mat.supr-con

Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex

K. Nagasaka , G. Jinno , O. Miura , A. Miura , C. Moriyoshi , Y. Kuroiwa , Y. Mizuguchi This is my paper
classification cond-mat.supr-con
keywords fbis2-xsexin-planebulkchemicaldiffractionpowderpressurestructural
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Eu0.5La0.5FBiS2-xSex is a new BiS2-based superconductor system. In Eu0.5La0.5FBiS2-xSex, electron carriers are doped to the BiS2 layer by the substitution of Eu by La. Bulk superconductivity in this system is induced by increasing the in-plane chemical pressure, which is controlled by the Se concentration (x). In this study, we have analysed the crystal structure of Eu0.5La0.5FBiS2-xSex using synchrotron powder diffraction and the Rietveld refinement. The precise determination of the structural parameters and thermal factors suggest that the emergence of bulk superconductivity in Eu0.5La0.5FBiS2-xSex is achieved by the enhanced in-plane chemical pressure and the decrease in in-plane disorder.

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