论文标题
从势能景观的角度来看，安格尔情节
The Angell Plot from the Potential Energy Landscape Perspective
论文作者
论文摘要
在势能景观（PEL）的情况下，已经开发了一种热力学模型来揭示Angell图背后的物理。在我们的模型中，通过将PEL的屏障分布分离为高斯样和幂律形式，我们获得了松弛时间与温度之间的一般关系。 Angell图中的广泛实验数据以及分子动力学数据，可以通过两个特征参数，有效屏障（ω）和类似高斯样分布的有效宽度（σ）非常适合。更重要的是，发现所有玻璃的拟合ω和σ^2在非常狭窄的频段内具有简单的线性关系，并且在ω-σ^2图中易碎和强玻璃，这表明玻璃状态仅出现在Pel的特定区域中。
Within the scenario of the potential energy landscape (PEL), a thermodynamic model has been developed to uncover the physics behind the Angell plot. In our model, by separating the barrier distribution in PELs into a Gaussian-like and a power-law form, we obtain a general relationship between the relaxation time and the temperature. The wide range of the experimental data in the Angell plot, as well as the molecular-dynamics data, can be excellently fitted by two characteristic parameters, the effective barrier (ω) and the effective width (σ) of a Gaussian-like distribution. More importantly, the fitted ω and σ^2 for all glasses are found to have a simple linear relationship within a very narrow band, and fragile and strong glasses are well separated in the ω-σ^2 plot, which indicates that glassy states only appear in a specific region of the PEL.
