Potential energy, relaxation, vibrational dynamics and the boson peak, of hyperquenched glasses

Charles Angell, Yuanzheng Yue, Li Min Wang, John R D Copley, Steve Borick, Stefano Mossa

Research output: Contribution to journalArticle

118 Scopus citations

Abstract

Laboratory and simulation studies were performed, making it possible to obtain quantitative information on the energy landscape for glass-forming liquids. Focus was on the idea of suddenly extracting the thermal energy, so that the system obtained for subsequent study has the structure, and hence potential energy, of a liquid at a much higher temperature than the normal glass temperature. Results show that, when the temperature is raised at constant pressure, the total density of states changes in a manner that can be well represented by a two-Gaussian excitation across the centroid, leaving a third and major Gaussian component unchanging. The low frequency Gaussian component has a constant peak frequency of 18 cm-1 and is identified with the Boson peak.

Original languageEnglish (US)
Pages (from-to)S1051-S1068
JournalJournal of Physics Condensed Matter
Volume15
Issue number11
DOIs
StatePublished - Mar 26 2003

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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