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Updated: Sep 13, 2025
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Published on: September 5, 2018
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在不对称的和链中进行热化
Weicheng Fu1,2,3, Sihan Feng4, Yong Zhang3,4
1Department of Physics, Tianshui Normal University, Tianshui 741001, China.
Entropy (Basel, Switzerland)
|July 29, 2025
概括
粒子间相互作用潜力 (IIP) 的不对称性显著影响固体中的热化. 这项研究揭示了不对称性增强了放松动态,与非线性不同,观察到一种新的权力法关系.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 统计力学 统计力学
- 材料科学 材料科学 材料科学
背景情况:
- 粒子间相互作用电位 (IIP) 的对称性对于固体的热力学和传输性质至关重要.
- 在IIP中,不对称性和非线性往往相互关联,因此很难研究它们的孤立影响.
- 了解热化动态是预测各种条件下的材料行为的关键.
研究的目的:
- 调查IIP不对称性对热化动态的孤立影响.
- 介绍和分析一个一维的不对称波 (AH) 模型,以解离不对称与非线性.
- 为了探索一个系统的热化与IIP不对称性和非线性结合.
主要方法:
- 开发一个具有不对称性但没有非线性的一维不对称波 (AH) 模型.
- 进行广泛的数值模拟来研究热化时间 (Teq).
- 在不对称和不对称-非线性模型中分析热化时间和扰动强度之间的关系.
主要成果:
- 在AH链中证实了热化时间和扰动强度之间的功率定律关系.
- 在AH链中观察到的指数大于先前已知的反正方法.
- 马蒂森的规则有效地估计了当对称四边形非线性被添加到AH模型时的热化时间.
结论:
- 粒子间相互作用的潜在不对称性在热化动态中起着独特的作用,与非线性分开.
- 不对称性增强了高阶效应,并控制了固体中的放松动态.
- 这些发现为凝聚物质系统中热化的基本机制提供了新的见解.
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