Effects of pressure on the boson peak of tellurite (TeO2) 1-x(ZnO)x glasses: Evidence of an elastic glass-to-glass transition

Elissaios Stavrou; Constantine Raptis; Karl Syassen

doi:10.1103/PhysRevB.81.174202

Effects of pressure on the boson peak of tellurite (TeO₂) _1-x(ZnO)_x glasses: Evidence of an elastic glass-to-glass transition

Elissaios Stavrou^*, Constantine Raptis, Karl Syassen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The Raman spectra of three (TeO₂)_1-x(ZnO)_x (x=0.1, 0.2, and 0.4) glasses have been measured under pressure up to 13 GPa. We report an unusual pressure dependence of the Boson peak frequency which is quite different from that observed in relevant experiments for other network glasses or predicted by theory. The unexpected observed effect indicates that tellurite glasses respond like elastic, rather than plastic, media to both compression and decompression treatments. We suggest that, with respect to plastic versus elastic deformation mode, the behavior of glasses under pressure is not universal. Further, we conclude that a medium range order elastic glass-to-glass transition from a rigid to a more flexible network is induced by pressure for two of the glasses (x=0.2 0.4). This transition is reversible upon decompression, merely exhibiting a small hysteresis.

Original language	English
Article number	174202
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.81.174202
State	Published - 11 May 2010
Externally published	Yes

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abstract = "The Raman spectra of three (TeO2)1-x(ZnO)x (x=0.1, 0.2, and 0.4) glasses have been measured under pressure up to 13 GPa. We report an unusual pressure dependence of the Boson peak frequency which is quite different from that observed in relevant experiments for other network glasses or predicted by theory. The unexpected observed effect indicates that tellurite glasses respond like elastic, rather than plastic, media to both compression and decompression treatments. We suggest that, with respect to plastic versus elastic deformation mode, the behavior of glasses under pressure is not universal. Further, we conclude that a medium range order elastic glass-to-glass transition from a rigid to a more flexible network is induced by pressure for two of the glasses (x=0.2 0.4). This transition is reversible upon decompression, merely exhibiting a small hysteresis.",

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AU - Syassen, Karl

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AB - The Raman spectra of three (TeO2)1-x(ZnO)x (x=0.1, 0.2, and 0.4) glasses have been measured under pressure up to 13 GPa. We report an unusual pressure dependence of the Boson peak frequency which is quite different from that observed in relevant experiments for other network glasses or predicted by theory. The unexpected observed effect indicates that tellurite glasses respond like elastic, rather than plastic, media to both compression and decompression treatments. We suggest that, with respect to plastic versus elastic deformation mode, the behavior of glasses under pressure is not universal. Further, we conclude that a medium range order elastic glass-to-glass transition from a rigid to a more flexible network is induced by pressure for two of the glasses (x=0.2 0.4). This transition is reversible upon decompression, merely exhibiting a small hysteresis.

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Effects of pressure on the boson peak of tellurite (TeO₂) _1-x(ZnO)_x glasses: Evidence of an elastic glass-to-glass transition

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