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ARTICLE

Threshold behaviours in Ge_xAs₁₀Se_90-x and Ge_xSb₁₀Se_90-x glasses

S. W. Xu^*, T. W. Liang

College of Mathematics and Physics, Hunan University of Arts and Science, 415000, Changde, People’s Republic of China

* Corresponding Author:

Chalcogenide Letters 2023, 20(11), 829-835. https://doi.org/10.15251/CL.2023.2011.829

Received 07 September 2023; Accepted 13 November 2023;

Abstract

We investigated the effect of the elemental substitution of As by Sb on the threshold behaviours in Ge_xSb₁₀Se_90-x glasses. We found that, while the transition thresholds at MCN=2.4 and 2.67 were verified in the GeAsSe glasses, the transition thresholds can be changed to chemically stoichiometric compositions if As is substituted by Sb. We further deconvolved Raman spectra into different structural units and the change of their respective intensity showed the same behaviour, and this was ascribed to the chemical effect induced by a large difference of the atomic radius between As and Sb, and a relatively strong ionic feature of the element Sb.

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