Mallamace F, Corsaro C, Stanley H E, Chen S-H
Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Eur Phys J E Soft Matter. 2011 Sep;34(9):94. doi: 10.1140/epje/i2011-11094-7. Epub 2011 Sep 23.
We discuss the role of the dynamic glass-forming fragile-to-strong crossover (FSC) in supercooled liquids. In the FSC, significant dynamic changes such as the decoupling (the violation of the Stokes-Einstein relation) of homologous transport parameters, e.g., the density relaxation time τ and the viscosity η, occur at a characteristic temperature T(c). We study the FSC using a scaling law approach. In particular, we use both forms of the mode-coupling theory (MCT): the original (ideal) and the extended form, which explicitly describes energy hopping processes. We demonstrate that T(c) plays the most important physical role in understanding dynamic arrest processes.
我们讨论了动态玻璃形成的脆弱到强交叉（FSC）在过冷液体中的作用。在FSC中，诸如同源传输参数（例如密度弛豫时间τ和粘度η）的解耦（斯托克斯 - 爱因斯坦关系的违反）等显著的动态变化发生在特征温度T(c)处。我们使用标度律方法研究FSC。特别是，我们使用了两种形式的模式耦合理论（MCT）：原始（理想）形式和扩展形式，后者明确描述了能量跳跃过程。我们证明T(c)在理解动态阻滞过程中起着最重要的物理作用。
