Homopolar bonds in Se-rich Ge-As-Se chalcogenide glasses |
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Affiliation: | 1. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;2. Laser Physics Centre, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, Australia;3. College of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China |
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Abstract: | We have prepared three groups of Ge-As-Se glasses in which the Se content is 5.5 mol%, 10 mol%, and 20 mol% rich, respectively. We explored the possibility of suppressing the formation of the Ge-Ge and As-As homopolar bonds in the glasses. Thermal kinetics analysis indicated that the 5.5 mol% Se-rich Ge11.5As24Se64.5 glass exhibits the minimum fragility and thus is most stable against structural relaxation. Analysis of the Raman spectra of the glasses indicated that the Ge-Ge and As-As homopolar bonds could be almost completely suppressed in 20 mol% Se-rich Ge15As14Se71 glass. |
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Keywords: | chalcogenide glasses structure differential scanning calorimetry Raman scattering |
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