Study of the Ge20Te80-xSex glassy structures by combining solid state NMR, vibrational spectroscopies and DFT modelling

The glassy ternary system Ge-Te-Se is currently receiving an increased attention due to its extended range of transmission in the infrared opening the way to various potential applications in photonics. In this study, a multi-techniques approach combining solid-state NMR, Raman and infrared spectros...

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Bibliographic Details
Published in:Journal of solid state chemistry 2021-05, Vol.297, p.122062, Article 122062
Main Authors: Gonçalves, Claudia, Mereau, Raphaël, Nazabal, Virginie, Boussard-Pledel, Catherine, Roiland, Claire, Furet, Eric, Deschamps, Michaël, Bureau, Bruno, Dussauze, Marc
Format: Article
Language:English
Subjects:
Chalcogenide glasses
Chemical Sciences
DFT modelling
ss-NMR spectroscopy
Structure
Vibrational spectroscopies
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Summary:The glassy ternary system Ge-Te-Se is currently receiving an increased attention due to its extended range of transmission in the infrared opening the way to various potential applications in photonics. In this study, a multi-techniques approach combining solid-state NMR, Raman and infrared spectroscopies and DFT calculations provides insight into the organization of the GeSe4-GeTe4 glassy network and allows to clarify a whole structural description of the glassy system. A particular attention is devoted to the presence of mixed GeTe8-xSex structural units and to the type of interconnections forming the glass networks. Such experimental/theoretical approach is provided both for the selenium and the tellurium rich part of the glassy system. A multi technical approach (Raman, IR, NMR and DFT calculation) to describe mixed selenide-telluride glassy structures. [Display omitted] •A multi technical approach (Raman, IR, NMR and DFT calculation) to describe mixed selenide-telluride glassy structures.•Structural description for both the selenide and telluride rich part the system.•Local structural entities and their interconnections description in this GeSeTe glassy structures.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2021.122062