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To investigate the relationship between the partial structures and the stiffness transition in AsxSe1−x glasses, anomalous X-ray scattering (AXS) and X-ray and neutron diffraction (XRD and ND) experiments were carried out. For the AXS experiments, anomalous terms near the absorption edges were experimentally obtained instead of the theoretical values with large ambiguities. The results were analyzed by reverse Monte Carlo (RMC) modeling to obtain partial structure factors, S i j(Q), partial pair distribution functions, gi j(r), and three-dimensional atomic configurations. The S i j(Q) and gi j(r) functions gradually vary with x; however, an important change was observed in the intermediate-range element-selective atomic structures (the so-called hyper-ordered structures) near the stiffness transition composition. With decreasing x across the so-called intermediate phase compositions, a rapid decrease of the As-As wrong bonds is visualized. However, the other anomalies found in Ge–Se glasses are not clearly observed, such as a rapid decrease in pre-shoulder position in SSeSe(Q), a rapid decrease in the number of edge-sharing connections, and an exclusion tendency of the connections between the As(Ge) atoms sharing two Se atoms, which may be related to the anisotropic pyramidal atomic configurations around the As atoms in the As-Se glasses in contrast to the isotropic tetrahedral ones around the Ge atoms in the Ge-Se glasses.

Rights:

• In Copyright
  ©2024 The Physical Society of Japan
  Shinya Hosokawa,Jens Rüdiger Stellhorn,Nathalie Boudet ,Nils Blanc,Eisuke Magome, László Pusztai ,Shinji Kohara,Kazutaka Ikeda,Toshiya Otomo.(2024).
  Local- and Intermediate-range Partial Structure Study of As–Se Glasses.
  Physical Society of Japan,93,014601.https://doi.org/10.7566/JPSJ.93.014601.

Keyword: chalcogenide glass, structure

Date published: 2024-01-15

Publisher: Physical Society of Japan

Journal:

• Journal of the Physical Society of Japan (ISSN: 13474073)

Funding:

• Japan Society for the Promotion of Science 21H05569
• Japan Society for the Promotion of Science 23H04117
• Japan Society for the Promotion of Science 22K12662
• Core Research for Evolutional Science and Technology JPMJCR1861

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4458

First published URL: https://doi.org/10.7566/jpsj.93.014601

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Updated at: 2024-04-02 08:30:16 +0900

Published on MDR: 2024-04-02 08:30:16 +0900