Structural and topological changes in silica glass at pressure

C. J. Benmore, E. Soignard, S. A. Amin, M. Guthrie, S. D. Shastri, P. L. Lee, Jeffery Yarger

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

The effects of high pressures on the structure of silica glass have been elucidated using high-energy x-ray diffraction up to 43.5 GPa. A decrease in the first two peak positions in the real-space pair-distribution functions up to 15 GPa indicates an initial shrinkage of the tetrahedral units. Above this threshold pressure the Si-O bond peak shape becomes asymmetric and the average Si-O bond length and coordination number both increase linearly with pressure. Also, strained geometries in the O-O correlations lead a pronounced topological rearrangement of the second and third nearest neighbors.

Original languageEnglish (US)
Article number054105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number5
DOIs
StatePublished - Feb 5 2010

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silica glass
Fused silica
coordination number
shrinkage
x ray diffraction
distribution functions
Bond length
Distribution functions
thresholds
geometry
Diffraction
X rays
Geometry
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Structural and topological changes in silica glass at pressure. / Benmore, C. J.; Soignard, E.; Amin, S. A.; Guthrie, M.; Shastri, S. D.; Lee, P. L.; Yarger, Jeffery.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 5, 054105, 05.02.2010.

Research output: Contribution to journalArticle

Benmore, C. J. ; Soignard, E. ; Amin, S. A. ; Guthrie, M. ; Shastri, S. D. ; Lee, P. L. ; Yarger, Jeffery. / Structural and topological changes in silica glass at pressure. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 81, No. 5.
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