Microstructure and Fe-vacancy ordering in the KFexSe2 superconducting system

Z. Wang; Y. J. Song; H. L. Shi; Z. W. Wang; Z. Chen; H. F. Tian; G. F. Chen; J. G. Guo; H. X. Yang; J. Q. Li

doi:10.1103/PhysRevB.83.140505

Microstructure and Fe-vacancy ordering in the KFexSe2 superconducting system

Superconductivity 2013-05-29 v3

Authors: Z. Wang , Y. J. Song , H. L. Shi , Z. W. Wang , Z. Chen , H. F. Tian , G. F. Chen , J. G. Guo , H. X. Yang , J. Q. Li

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Abstract

Structural investigations by means of transmission electron microscopy (TEM) on KFexSe2 with 1.5 \leq x \leq 1.8 have revealed a rich variety of microstructure phenomena, the KFe1.5Se2 crystal often shows a superstructure modulation along the [310] zone-axis direction, this superstructure can be well interpreted by the Fe-vacancy order within the a-b plane. Increase of Fe-concentration in the KFexSe2 materials could not only result in the appearance of superconductivity but also yield clear alternations of microstructure. Structural inhomogeneity, the complex superstructures and defect structures in the superconducting KFe1.8Se2 sample have been investigated based on the high-resolution TEM.

Keywords

iron-based superconductor high-temperature superconductivity superconductivity

Cite

@article{arxiv.1101.2059,
  title  = {Microstructure and Fe-vacancy ordering in the KFexSe2 superconducting system},
  author = {Z. Wang and Y. J. Song and H. L. Shi and Z. W. Wang and Z. Chen and H. F. Tian and G. F. Chen and J. G. Guo and H. X. Yang and J. Q. Li},
  journal= {arXiv preprint arXiv:1101.2059},
  year   = {2013}
}

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13 pages, 4 figures

Microstructure and Fe-vacancy ordering in the KFexSe2 superconducting system

Abstract

Keywords

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