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Title: A comparative study of the atomic structures of Ge-doped As4S3 and P4Se3 molecular glasses

Journal Article · · Journal of Non-Crystalline Solids
 [1];  [2];  [3];  [4];  [5]
  1. Hacettepe Univ., Ankara (Turkey). Dept. of Physics Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  3. Corning Inc., Corning, NY (United States). Science and Technology Division
  4. Univ. of California, Davis, CA (United States). Dept. of Materials Science
  5. 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

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Cited By (1)

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Figures / Tables (11)