Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.205701
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Funding
- National Science Foundation [EAR-1722495]
- DOE-NNSA's Office of Experimental Sciences
- DOE Office of Science [DEAC02-06CH11357]
- JSPS KAKENHI [19KK0093, 20H00201]
- JSPS Bilateral Program [JPJSBP120209926]
- NSF [EAR-1620548]
- Grants-in-Aid for Scientific Research [20H00201, 19KK0093] Funding Source: KAKEN
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Pair distribution function measurement of SiO2 glass up to 120 GPa reveals changes in the first-, second-, and third-neighbor distances associated with an increase in Si coordination number C-Si to >6 above 95 GPa. Packing fractions of Si and O determined from the first- and second-neighbor distances show marked changes accompanied with the structural evolution from C-Si = 6 to >6. Structural constraints in terms of ionic radius ratio of Si and O, and ratio of nonbonded radius to bonded Si-O distance support the structural evolution of SiO2 glass with C-Si > 6 at high pressures.
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