| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Current Issues and Functional Applications
|
| Presentation Title |
Topological Phases and Melt Dynamics of the Equimolar Ternary Ge-As-S and Ge-P-Se Glass Systems |
| Author(s) |
Dr. Badriah S. Almutairi, Aaron Welton, Punit Boolchand |
| On-Site Speaker (Planned) |
Dr. Badriah S. Almutairi |
| Abstract Scope |
The equimolar ternary chalcogenides, GexAsxS100-2x and GexPxSe100-2x are attractive for probing Topological Phases and Melt dynamics. These display the widest Intermediate Phases (IPs) ranging from 9% < x < 18% for the GexPxSe100-2x ternary and from 9% < x < 16% for the GexAsxS100-2x ternary. Their molecular structures were elucidated by Raman scattering and Calorimetry. The melt fragility index shows a Gaussian-like global minimum with m = 14 for the GexPxSe100-2x system, but a saw-tooth like global minimum with m = 15 at the stress transition for the GexAsxS100-2x system across the IP. In the sulfide glasses the decoupling of S8 rings across IP compositions influences the fragility index but leaves the glass reversibility window intact. |