在平衡的深玻璃制度中,中距离的秩序,密度波动和激活的放松
Baicheng Mei1,2, Kenneth S Schweizer1,2,3
1University of Illinois, Department of Materials Science, Urbana, Illinois 61801, USA.
Physical review letters
|July 31, 2025
概括
一个超冷液体的微观理论成功地扩展到深层玻璃,显示动态障碍与顺序参数一致尺度. 这一发现支持了玻璃成型材料中超慢动力学和中程结构秩序之间的联系.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 是一种材料科学.
- 统计力学就是统计力学.
背景情况:
- 超冷的超稳定液体在玻璃化过渡附近表现出复杂的动态.
- 了解玻璃形成材料在深层玻璃体制中的行为对于材料科学至关重要.
- 现有的理论往往难以在广的时间尺度上解释动态.
研究的目的:
- 为了将激活放松的微观理论扩展到平衡的深玻璃状态.
- 为了研究动态屏障与眼镜中的标量顺序参数之间的关系.
- 为了使理论预测与老化玻璃成型液体的实验数据相协调.
主要方法:
- 一个微观理论的扩展,用于激活放松.
- 分析动态障碍和顺序参数 (相关长度,可压缩性,剪切模量) 之间的功率规律缩放关系.
- 对长时间内老化玻璃成型液体的实验数据进行定量比较.
主要成果:
- 预测的动态障碍与顺序参数的动力规律缩放在深层玻璃制度中仍然有效,即使是在天文时间尺度上.
- 尽管在动力玻璃化点附近发生了热力学和结构交叉,但这种缩放仍然存在.
- 在时间尺度上,近20年的实验数据显示与理论有很好的一致性.
结论:
- 理论缩放的稳定性表明,超慢的动态与中距离的结构秩序有因果关系.
- 这些发现挑战了从超级Arrhenius到Arrhenius放松在玻璃过渡温度的交叉概念.
- 这项研究为深玻璃系统的实验和理论研究开辟了新的途径.
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