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Local Structure of FeSe 0.4 Te 0.6 by Low‐Temperature X‐Ray Fluorescence Holography
Author(s) -
Stellhorn Jens Rüdiger,
Ideguchi Yuki,
Kimura Koji,
Hayashi Kouichi,
Happo Naohisa,
Suzuki Motohiro,
Okazaki Hiroyuki,
Yamashita Aichi,
Takano Yoshihiko,
Hosokawa Shinya
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800093
Subject(s) - x ray absorption fine structure , holography , materials science , lattice (music) , fluorescence , local structure , superconductivity , x ray , condensed matter physics , crystallography , optics , physics , spectroscopy , chemistry , quantum mechanics , acoustics
We present low‐temperature X‐ray fluorescence holography experiments to investigate the atomic scale structure of the high‐temperature superconductor FeSe 0.4 Te 0.6 . 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 L 1 ‐regularized linear regression. The results are in good agreement with previous findings of XRD and XAFS experiments on the FeSe 1− x Te x system, 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 FeSe 1− x Te x structure.