Local Structure of FeSe0.4Te0.6 by Low‐Temperature X‐Ray Fluorescence Holography. Issue 11 (5th July 2018)

• Record Type: Journal Article
• Authors: Stellhorn, Jens Rüdiger; Ideguchi, Yuki; Kimura, Koji; Hayashi, Kouichi; Happo, Naohisa; Suzuki, Motohiro; Okazaki, Hiroyuki; Yamashita, Aichi; Takano, Yoshihiko; Hosokawa, Shinya
• Other Names: Hosokawa Shinya guestEditor.; Pusztai László guestEditor.
• Is Part Of: Physica status solidi. Volume 255:Issue 11(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-07-05
• Subjects: FeSeTe -- local atomic structure -- sparse modeling -- superconductor -- X‐ray fluorescence holography; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201800093
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : We present low‐temperature X‐ray fluorescence holography experiments to investigate the atomic scale structure of the high‐temperature superconductor FeSe0.4 Te0.6 . 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− 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 FeSe1− x Te x structure. Abstract : The atomic scale structure of the high‐temperature superconductor FeSe0.4 Te0.6 is investigated by low‐temperature X‐ray fluorescence holography experiments using a sparse modeling approach to the experimental data. The results are in good agreement with previous findings of XRD and XAFS experiments on the FeSe1− x Te x system, but furthermore indicate large fluctuations in the Fe sub‐lattice.