在密集的合体悬浮液中放松的结构起源
Ratimanasee Sahu1, Mohit Sharma2,3, Peter Schall4
1Physics Division, Indian Institute of Science Education and Research Pune, Pune 411008, India.
概括
研究人员确定了一个新的结构顺序参数来预测无形固体中的放松. 这一参数基于粒子子,有助于确定易于重新排列的弱区域,从而提高我们对无序材料的理解.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 统计力学 统计力学
背景情况:
- 无形固体通过分子重新排列而经历结构放松,由热波动或应力驱动.
- 预测这些放松依赖于动态特性或复杂的计算模型,缺乏简单的结构指标.
- 在无序系统中预测放松的物理意义上的结构量仍然难以捉摸.
研究的目的:
- 引入和验证一种新的结构顺序参数,用于预测无形固体中的结构松.
- 为了建立这个参数和实验观察到的放松之间的直接相关性.
- 为了证明参数在静止和剪切无形系统中的实用性.
主要方法:
- 从粒子所经历的平均场封闭潜力中推导出结构顺序参数.
- 使用密度函数理论来计算结构参数.
- 在静止和剪切条件下使用密集的合物悬浮液进行实验验证.
主要成果:
- 引入的结构顺序参数可靠地预测结构放松的发生.
- 观察到顺序参数和实验性结构松在体悬浮液之间存在强烈的相关性.
- 该参数有效地识别了易受粒子重排的弱点或缺陷类区域.
- 在剪切系统中,参数准确地确定了剪切转换位点.
结论:
- 开发的结构顺序参数提供了在无形固体中放松的物理意义和预测度量.
- 这一发现为了解和控制无序材料的机械行为提供了新的途径.
- 该方法适用于广泛的无形固体,包括悬浮物和金属玻璃.
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