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arXiv 2501.07902cond-mat.dis-nnphysics.comp-ph
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用于探索过冷液体势能景观的均方能量差

Mean-squared Energy Difference for Exploring Potential Energy Landscapes of Supercooled Liquids

Dianmo Zhang, Deyan Sun, Xingao Gong

AI总结:

本文提出均方能量差(MSED)作为新量,将扩散概念扩展到势能景观以研究过冷液体玻璃,建立了MSED与PEL性质的定量联系,并揭示了玻璃转变后PEL粗糙度的显著变化及其与Adam-Gibbs构型熵的关联。

摘要:

通过将扩散概念扩展到势能景观(PELs),我们引入均方能量差(MSED)作为一种新的量来研究玻璃的内在性质。MSED能够清晰地描述PEL上的“能量弛豫”过程。通过MSED分析,我们可以获得与结构分析相似的特征时间尺度,即$τ_α^*$。我们建立了MSED与PEL性质之间的联系,提供了对PEL的简洁定量描述。我们发现,在玻璃转变之后,可及PEL的粗糙度发生了显著变化。我们还发现,其中一个PEL参数与Adam-Gibbs构型熵密切相关。本研究将PEL与弛豫过程直接联系起来,为进一步研究玻璃提供了途径。

英文摘要:

By extending the concept of diffusion to the potential energy landscapes (PELs), we introduce the mean-squared energy difference (MSED) as a novel quantity to investigate the intrinsic properties of glass. MSED can provide a clear description of the "energy relaxation" process on a PEL. Through MSED analysis, we can obtain characteristic timescale similar to those from structure analysis, namely $τ_α^*$. We establish a connection between MSED and the properties of PELs, providing a concise and quantitative description of the PEL. We find that the roughness of the accessible PEL has changed significantly after the glass transition. And we also find that one of the PEL parameters is closely related to the Adam-Gibbs configurational entropy. The present research, which directly links the PEL to the relaxation process, provides avenues for further research of the glass.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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