Non-Ergodicity and Non-Gaussianity in Vitrification Process
Non-Ergodicity and Non-Gaussianity in Vitrification Process
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玻璃化过程中的非遍历性和非高斯性
DOI：
10.1143/ptps.126.9
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发表时间：
1997
影响因子：
--
通讯作者：
T. Odagaki
中科院分区：
文献类型：
--
作者：
T. Odagaki
玻璃化是过冷液体的逐渐凝固过程，在此过程中原子动力学从扩散运动转变为局部振动。我定义了两个特征温度，在这两个特征温度下，由等待时间分布的平均值和波动定义的两个特征时间有所不同。我还根据广义磁化率的峰值定义了主弛豫时间，该峰值在等待时间分布的标准化变得不可能的点处发散。我表明，非高斯参数在由这些特征温度区分的温度区域中的行为在性质上有所不同。
Vitrification is a gradual solidification process of supercooled liquids, during which atomic dynamics changes from diffusive motion to localized vibration. I define two characteristic temperatures at which two characteristic times defined by the mean and the fluctuation of the waiting time distribution diverges. I also define the main relaxation time from the peak of the generalized susceptibility which diverges at the point where the normalization of the waiting time distribution becomes impossible. I show that the non-Gaussian parameter behaves qualitatively differently in the temperature regions distinguished by these characteristic temperatures.