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Breakdown of intermediate range order in AsSe chalcogenide glass.
- Source :
- Journal of Applied Physics; 2016, Vol. 120 Issue 14, p1-6, 6p, 1 Diagram, 1 Chart, 4 Graphs
- Publication Year :
- 2016
-
Abstract
- As-cast amorphous AsSe (a-AsSe) has been characterized by in-situ high pressure XRD and Raman spectroscopy up to the pressure of ~30GPa using diamond anvil cell together with ab-initio molecular dynamics simulations. A gradual densification has been observed under compression along with the breakdown of intermediate range ordering at ~16GPa. The whole transformation process can be divided into three relatively distinct pressure regimes from 1 bar to 7GPa, from 7 to 16GPa, and beyond 16GPa. Our XRD results together with Raman spectroscopic studies confirm that in the a-AsSe pressure tuning results in network transformations only, without sudden jump in the density. The results obtained by high pressure ab-initio molecular dynamics simulations demonstrate the variations in the local structures associated with the experimentally observed transformations. The amorphous-to-amorphous network transformation is found to be reversible upon decompression. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 120
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 118874040
- Full Text :
- https://doi.org/10.1063/1.4964798