Non-equilibrium entropy of glasses formed by continuous cooling

John Mauro, Prabhat K. Gupta, Roger J. Loucks, Arun K. Varshneya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We propose a generalized definition of entropy accounting for the continuous breakdown of ergodicity at the laboratory glass transition. Our approach is applicable through all regimes of glass forming, from the equilibrium liquid state through the glass transition range and into the glassy state at low temperatures. The continuous loss of ergodicity during the laboratory glass transition is accompanied by a loss of entropy as the system gradually becomes trapped in a subset of the configurational phase space. Using a hierarchical master equation approach, we compute the configurational entropy of selenium, a simple but realistic glass-former, for cooling rates covering 25 orders of magnitude, viz., 10-12 to 1012 K/s. In all cases, the entropy of glass is zero in the limit of absolute zero temperature, since here the system is necessarily confined to a single microstate.

Original languageEnglish (US)
Pages (from-to)600-606
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume355
Issue number10-12
DOIs
StatePublished - May 1 2009

Fingerprint

Entropy
entropy
Cooling
cooling
Glass transition
Glass
glass
Selenium
absolute zero
selenium
Temperature
set theory
Liquids
coverings
breakdown
liquids
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Mauro, John ; Gupta, Prabhat K. ; Loucks, Roger J. ; Varshneya, Arun K. / Non-equilibrium entropy of glasses formed by continuous cooling. In: Journal of Non-Crystalline Solids. 2009 ; Vol. 355, No. 10-12. pp. 600-606.
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Non-equilibrium entropy of glasses formed by continuous cooling. / Mauro, John; Gupta, Prabhat K.; Loucks, Roger J.; Varshneya, Arun K.

In: Journal of Non-Crystalline Solids, Vol. 355, No. 10-12, 01.05.2009, p. 600-606.

Research output: Contribution to journalArticle

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