Local structure of FeSe0.4Te0.6 by low‐temperature x‐ray fluorescence holography
Local structure of FeSe0.4Te0.6 by low‐temperature x‐ray fluorescence holography
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低温X射线荧光全息法研究FeSe0.4Te0.6的局域结构
DOI：
10.1002/pssb.201800093
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
and S. Hosokawa
中科院分区：
文献类型：
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作者：
J. R. Stellhorn;Y. Ideguchi;K. Kimura;K. Hayashi;N. Happo;M. Suzuki;H. Okazaki;A. Yamashita;Y. Takano;and S. Hosokawa
我们提出了低温X射线荧光全息实验来研究高温超导体FeSe0.4Te0.6的原子尺度结构。结果提出了一个直接调查的本地结构周围的Fe原子。通过使用L1正则化线性回归对实验数据进行稀疏建模，获得了非常清晰的结构图像。结果与之前在FeSe1− xTex系统上的XRD和XAFS实验结果非常一致，但进一步表明Fe子晶格中存在较大的波动。这些发现也代表了进一步讨论FeSe1−xTexstructure更奇怪特征的起点。
We present low‐temperature X‐ray fluorescence holography experiments to investigate the atomic scale structure of the high‐temperature superconductor FeSe0.4Te0.6. The results present a direct investigation of the local structure around the Fe atoms. Very clear images of the structure are obtained by a sparse modeling approach to the experimental data using a L1‐regularized linear regression. The results are in good agreement with previous findings of XRD and XAFS experiments on the FeSe1−xTexsystem, but furthermore indicate large fluctuations in the Fe sub‐lattice. The findings also represent a starting point for further discussions on more curious features of the FeSe1−xTexstructure.