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Pressure Raman effects and internal stress in network glasses
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Fei Mamedov, Sh D. Boolchand, Punit Chandrasekhar, Meera |
| Copyright Year | 2005 |
| Abstract | Raman scattering from binary Ge xSe1−x glasses under hydrostatic pressure shows onset of a steady increase in the frequency of modes of corner-sharing GeSe 4 tetrahedral units when the external pressure P xceeds a threshold valuePc. The threshold pressure Pcsxd decreases withx in the 0.15,x,0.20 range, nearly vanishes in the 0.20,x,0.25 range, and then increases in the 0.25 ,x,1/3 range. ThesePcsxd trends closely track those in the nonreversing enthalpy, DHnrsxd, near glass transitions sTgsd, and in particular, bothDHnrsxd and Pcsxd vanish in the reversibility windows0.20,x,0.25d. It is suggested that Pc provides a measure of stress at the Raman-active units, and its vanishing in the reversibility window suggests that these units are part of an isostatically rigid backbone. Isostaticity also accounts for the nonaging behavior of glasses observed in the reversibility window. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://eecs.ceas.uc.edu/~pboolcha/papers/2005/Fei_Wang_DAC_PRB_Feb%2023.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Eyeglasses Greater Than or Equal To Hydrostatic Pressure Internet backbone Muscle Rigidity Onset (audio) Raman scattering Vertebral column |
| Content Type | Text |
| Resource Type | Notice |
