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

doi:10.1088/1742-6596/871/1/012007

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

Superconductivity 2017-09-13 v1

Authors: K. Nagasaka , G. Jinno , O. Miura , A. Miura , C. Moriyoshi , Y. Kuroiwa , Y. Mizuguchi

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Abstract

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.

Keywords

synchrotron powder diffraction Rietveld refinement BiS2-based superconductor Eu0.5La0.5FBiS2-xSex chemical pressure bulk superconductivity in-plane disorder

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@article{arxiv.1701.07575,
  title  = {Synchrotron powder X-ray diffraction and structural analysis of Eu0.5La0.5FBiS2-xSex},
  author = {K. Nagasaka and G. Jinno and O. Miura and A. Miura and C. Moriyoshi and Y. Kuroiwa and Y. Mizuguchi},
  journal= {arXiv preprint arXiv:1701.07575},
  year   = {2017}
}

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5 pages, 2 figures, to appear in proceedings of ISS2016

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

Abstract

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