期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 5, 期 7, 页码 1170-1174出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz500239w
关键词
-
类别
资金
- National Natural Science Foundation of China [51171090, 51371107]
- Shandong Province Natural Science Foundation [ZR2010EQ026]
It is known that both the fragile-to-strong (F-S) transition and relaxation processes occur in numerous supercooled liquids upon cooling toward the glass transition temperature. The key question is whether and how these two dynamic processes are correlated. Here, we show a direct link between the two processes for both metallic glass-forming liquids (MGFLs) with different fragilities and also for nonmetallic glass-forming liquids. By comparing the F-S transition extent parameter f with the parameter r that characterizes the competition between the a and the slow beta relaxations, we have discovered a negative exponential connection between the two parameters of supercooled liquids. The finding indicates that the slow beta relaxation plays a dominant role in the F-S transition. This work provides new insight into the microscopic mechanism of the F-S transition and creates a strong basis for predicting whether and to what extent the F-S transition occurs in supercooled liquids.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据