A comparative study of the atomic structures of Ge-doped As4S3 and P4Se3 molecular glasses
- Hacettepe Univ., Ankara (Turkey). Dept. of Physics Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
- Corning Inc., Corning, NY (United States). Science and Technology Division
- Univ. of California, Davis, CA (United States). Dept. of Materials Science
- Macquarie Univ., North Ryde (Australia). Dept. of Earth and Planetary Sciences
The structures of pseudo-binary P-Se and As-S glasses with compositions close to the P4Se3 and As4S3 stoichiometry with a few atom %Ge doping were determined using Monte Carlo simulations constrained by density and x-ray scattering measurements. We find that these glasses consist predominantly of P4Se3 and As4S3 molecules. The Ge doping results in some important differences between the two glasses. The P-Se glass displays significantly higher intermolecular connectivity via P-Se-Ge linkages, consistent with the significantly higher glass transition temperature and lower fragility of this liquid compared to its As-S counterpart. We also speculate that a consequence of this difference in the intermolecular connectivity would be to delay any pressure induced conversion from a molecular to a network structure for the Ge doped P-Se glass compared to the Ge-doped As-S glass.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1559858
- Alternate ID(s):
- OSTI ID: 1636011
- Journal Information:
- Journal of Non-Crystalline Solids, Vol. 514
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Unravelling the mechanism of pressure induced polyamorphic transition in an inorganic molecular glass
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journal | March 2020 |
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