### Abstract

Vitrification is a gradual freezing process of supercooled liquids, during which a slow process is separated from the fast diffusive and microscopic motions. The slow process is identified as a non-trapped jump motion and can be characterized by the waiting time distribution (WTD) of the elementary relaxation process. We first show that the WTD can be expressed as a power law function in the long time limit in general with modest assumptions. Defining the glass transition temperature by vanishing diffusivity or the divergence of the mean waiting time, we relate the exponent to the Adam-Gibbs parameter Ts_{C}(T) where T is the temperature and s_{C}(T) is the excess entropy. We also show that the divergence of the fluctuation of WTD leads to a cross over in the non-Gaussianity and present a unified view of the dynamics in the vitrification process.

Original language | English |
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Pages (from-to) | 163-169 |

Number of pages | 7 |

Journal | Materials Research Society Symposium - Proceedings |

Volume | 455 |

Publication status | Published - Jan 1 1997 |

Event | Proceedings of the 1996 MRS Fall Meeting - Boston, MA, USA Duration: Dec 2 1996 → Dec 6 1996 |

### All Science Journal Classification (ASJC) codes

- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering

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## Cite this

*Materials Research Society Symposium - Proceedings*,

*455*, 163-169.