过冷液体在快速冷却极限下的非晶态凝固。

Amorphous solidification of a supercooled liquid in the limit of rapid cooling.

机构信息

Department of Physics, Beijing Normal University, Beijing 100875, China.

School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia.

出版信息

J Chem Phys. 2023 May 28;158(20). doi: 10.1063/5.0150312.

DOI:10.1063/5.0150312

PMID:37226992

Abstract

We monitor the transformation of a liquid into an amorphous solid in simulations of a glass forming liquid by measuring the variation of a structural order parameter with either changing temperature or potential energy to establish the influence of the cooling rate on amorphous solidification. We show that the latter representation, unlike the former, exhibits no significant dependence on the cooling rate. This independence extends to the limit of instantaneous quenches, which we find can accurately reproduce the solidification observed during slow cooling. We conclude that amorphous solidification is an expression of the topography of the energy landscape and present the relevant topographic measures.

摘要

我们通过测量结构序参量随温度或位能的变化来监测玻璃形成液体中液体向非晶固体的转变，从而确定冷却速率对非晶态固化的影响。我们表明，与前者不同，后者表示形式与冷却速率没有显著的依赖关系。这种独立性扩展到瞬时淬火的极限，我们发现它可以准确地再现缓慢冷却过程中观察到的凝固。我们的结论是，非晶态固化是能量景观地形的一种表现形式，并提出了相关的地形测量方法。