Short range order and topology of binary Ge-S glasses
| Title: | Short range order and topology of binary Ge-S glasses |
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| Authors: | Pethes, Ildikó, Jóvári, Pál, Michalik, Stefan, Wagner, Tomas, Prokop, Vit, Kaban, Ivan, Száraz, Dániel, Hannon, Alex, Krbal, Milos |
| Source: | Journal of Alloys and Compounds 936 (2023) 168170 |
| Publication Year: | 2022 |
| Collection: | Condensed Matter Physics (Other) |
| Subject Terms: | Physics - Chemical Physics, Condensed Matter - Materials Science |
| More Details: | Short range order and topology of Ge$_x$S$_{100-x}$ glasses over a broad composition range (20 $\le$ x $\le$ 42 in at%) was investigated by neutron diffraction, X-ray diffraction, and Ge K-edge extended X-ray absorption fine structure (EXAFS) measurements. The experimental data sets were fitted simultaneously in the framework of the reverse Monte Carlo simulation method. It was found that both constituents (Ge and S) satisfy the Mott-rule in all investigated glasses: Ge and S atoms have 4 and 2 neighbours, respectively. The structure of these glasses can be described with the chemically ordered network model: Ge-S bonds are preferred, S-S bonds are present only in S-rich glasses. Dedicated simulations showed that Ge-Ge bonds are necessary in Ge-rich glasses. Connections between Ge atoms (such as edge-sharing GeS$_{4/2}$ tetrahedra) in stoichiometric and S-rich glasses were analysed. The frequency of primitive rings was also calculated. Comment: published in Journal of Alloys and Compounds |
| Document Type: | Working Paper |
| DOI: | 10.1016/j.jallcom.2022.168170 |
| Access URL: | http://arxiv.org/abs/2209.06540 |
| Accession Number: | edsarx.2209.06540 |
| Database: | arXiv |
| DOI: | 10.1016/j.jallcom.2022.168170 |
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