Stress induced alignment of Se chains in supercooled Ge5Se95 liquid
Source abstract
Abstract
Abstract The structural modifications in Ge5Se95 supercooled liquid under the application of a uniaxial compressive load are investigated using one- and two-dimensional 77Se nuclear magnetic resonance spectroscopy. The spectroscopic results clearly demonstrate a stress-induced alignment of selenium chains in the structure of the liquid in planes perpendicular to the loading axis. The topological modifications due to this selenium chain alignment result in inefficient atomic packing in the liquid structure that is manifested in a decrease in the glass density and may have important implications in understanding the pronounced non-Newtonian shear thinning behavior observed in Se-rich chalcogenide glasses/liquids.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Phase-change materials and chalcogenides · Glass properties and applications · Material Dynamics and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
Show source-provided references
1. Shelby · 2009
2. Varshneya · 2013
3. Aitken · 2006
4. What is so exciting about non-linear viscous flow in glass, molecular dynamics simulations of brittle fracture and semiconductor–glass quantum composites10.1016/S0022-3093(98)00741-8 ↗
5. Non-newtonian viscous flow in glass10.1063/1.331272 ↗
6. Direct connection between anisotropic optical properties, polarizability and rheological behaviour of single-phase glass melts10.1016/0022-3093(93)91241-T ↗
7. The flow of glass at high stress levels: I. Non-newtonian behavior of homogeneous 0.08 Rb2O·0.92 SiO2 glasses10.1016/0022-3093(70)90108-0 ↗
8. Non-newtonian flow behaviour of glass melts as a consequence of viscoelasticity and anisotropic flow10.1016/0022-3093(94)90003-5 ↗
9. Response and structure of glass melts under extreme forming processes10.1016/0022-3093(85)90367-9 ↗
10. Indentation creep of Ge‐Se chalcogenide glasses below t-g: elastic recovery and non-newtonian flow10.1016/S0022-3093(01)01053-5 ↗
11. Strain-rate sensitivity of glasses10.1016/j.jnoncrysol.2014.08.023 ↗
12. Wang · Appl. Phys. Lett. · 2015 · 106 · 20190810.1063/1.4921708 ↗
13. Viscous flow behavior of selenium10.1016/0022-3093(73)90069-0 ↗
14. The relationship between indentation and uniaxial creep in amorphous selenium10.1557/JMR.1995.2024 ↗
15. The structural viscosity of softening senium glass
16. Two-dimensional nuclear magnetic resonance evidence for structural order in extruded phosphate glasses10.1016/S0022-3093(98)00802-3 ↗
17. Schmidt-Rohr · 1994
18. Observation of a continuous random network structure in GexSe100-x glasses: results from high-resolution Se-77 MATPASS/CPMG NMR spectroscopy10.1021/jp311320t ↗
19. Structure, connectivity, and configurational entropy of GexSe100-x glasses: results from Se-77 MAS NMR spectroscopy10.1021/jp1014143 ↗
20. Se-77 nuclear spin-lattice relaxation in binary Ge–Se glasses: insights into floppy versus rigid behavior of structural units10.1021/acs.jpcb.5b01934 ↗
21. Physical properties of the GexSe1-x glasses in the 0<x<0.42 range in correlation with their structure10.1016/j.jnoncrysol.2013.01.049 ↗