Structural defects of monolayer wet particles during melting under vertical vibration
Structural defects of monolayer wet particles during melting under vertical vibration
复制标题
垂直振动下单层湿颗粒熔融过程中的结构缺陷
DOI：
10.1103/physreve.105.014903
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发表时间：
2022-01-11
影响因子：
2.4
通讯作者：
Li，Ran
中科院分区：
文献类型：
--
作者：
Kong，P.;Wang，Peng;Li，Ran
相变过程中结构缺陷的演化对理解固液相变机理具有重要意义。然而，目前对拓扑缺陷的研究仍然采用对相关函数和取向序相关函数，难以局部量化结构缺陷的细节变化。本文提出局部体积分数作为精确量化结构缺陷变化的关键参数。实验结果表明，颗粒体系中结构缺陷的演化是由局部体积分数的减小引起的，因此相变的临界值可以由最小局部体积分数来确定。此外，根据结构缺陷的演化规律，可以推断相变是连续的，这与Kosterlitz-Alberless-Halperin-Nelson-Young理论是一致的。因此，利用局部体积分数对结构缺陷进行定量分析，有助于更清楚地了解固液相变的机理。
The evolution of structural defects during phase transition is of great significance to the understanding of the mechanism of solid-liquid transition. However, the current research on topological defects still uses the pair-correlation function and the orientational order correlation function, so it is difficult to quantify the detailed changes of structural defects locally. In this paper, the local volume fraction is proposed as a key parameter to accurately quantify the variation of structural defects. The experimental results indicate that the evolution of structural defects in the particle system is caused by the decrease of local volume fraction, so the critical value of phase transition could be determined by the minimum local volume fraction. Furthermore, according to the evolution law of structural defects, it can be deduced that the phase transition is continuous, which is consistent with the Kosterlitz-Thouless-Halperin-Nelson-Young theory. Therefore, the quantitative analysis of structural defects by using local volume fraction can help make the mechanism of solid-liquid phase transformation clearer.