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  • 标题:Adam-Gibbs model in the density scaling regime and its implications for the configurational entropy scaling
  • 本地全文:下载
  • 作者:Elżbieta Masiewicz ; Andrzej Grzybowski ; Katarzyna Grzybowska
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2015
  • 卷号:5
  • DOI:10.1038/srep13998
  • 出版社:Springer Nature
  • 摘要:To solve a long-standing problem of condensed matter physics with determining a proper description of the thermodynamic evolution of the time scale of molecular dynamics near the glass transition, we have extended the well-known Adam-Gibbs model to describe the temperature-volume dependence of structural relaxation times, τ α ( T , V ). We also employ the thermodynamic scaling idea reflected in the density scaling power law, τ α  = f ( T −1 V − γ ), recently acknowledged as a valid unifying concept in the glass transition physics, to differentiate between physically relevant and irrelevant attempts at formulating the temperature-volume representations of the Adam-Gibbs model. As a consequence, we determine a straightforward relation between the structural relaxation time τ α and the configurational entropy S C , giving evidence that also S C ( T , V ) = g ( T −1 V − γ ) with the exponent γ that enables to scale τ α ( T , V ). This important findings have meaningful implications for the connection between thermodynamics and molecular dynamics near the glass transition, because it implies that τ α can be scaled with S C .
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