4.7 Article

Angell plot from the potential energy landscape perspective

Journal

PHYSICAL REVIEW E
Volume 106, Issue 6, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.106.064129

Keywords

-

Funding

  1. National Natural Science Foundation of China
  2. ECNU Public Platform for Innovation
  3. [12188101]
  4. [11874148]

Ask authors/readers for more resources

By separating the barrier distribution in the potential energy landscape into Gaussian-like and power-law forms, researchers have found a general relationship between relaxation time and temperature, and discovered that glassy states only appear in a specific region of the landscape.
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 (omega) and the effective width (sigma) of a Gaussian-like distribution. More importantly, the fitted omega and sigma 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 omega-sigma 2 plot, which indicates that glassy states appear only in a specific region of the PEL.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available