Pressure Raman Effects and Internal Stress in Network Glasses

Simple item page
dc.creatorWang, Fei
dc.creatorMamedov, Sergey
dc.creatorBoolchand, P.
dc.creatorGoodman, B.
dc.creatorChandrasekhar, Meera
dc.date2004-08-24
dc.date2005-03-12
dc.date.accessioned2026-07-07T02:59:54Z
dc.date.available2026-07-07T02:59:54Z
dc.descriptionRaman scattering from binary GexSe1-x glasses under hydrostatic pressure shows onset of a steady increase in the frequency of modes of corner-sharing GeSe4 tetrahedral units when the external pressure P exceeds a threshold value Pc. The threshold pressure Pc(x) decreases with x 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. These Pc(x) trends closely track those in the non-reversing enthalpy, DeltaHnr(x), near glass transitions (Tgs), and in particular, both DeltaHnr(x) and Pc(x) vanish in the reversibility window (0.20 < x < 0.25). 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 non-aging behavior of glasses observed in the reversibility window.
dc.description1 PDF file contains text and 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0408502
dc.identifierhttp://arxiv.org/abs/cond-mat/0408502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24691
dc.subjectDisordered Systems and Neural Networks
dc.titlePressure Raman Effects and Internal Stress in Network Glasses
dc.typetext

Files

Collections

arXiv