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arXiv 2604.03413cond-mat.softcond-mat.mtrl-sciphysics.chem-phphysics.comp-ph
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复杂结晶路径的剖析

Anatomy of a Complex Crystallization Pathway

University of Michigan(密歇根大学)

Charlotte Shiqi Zhao, Domagoj Fijan, Sharon C. Glotzer

AI总结:

通过分子动力学模拟,研究两种形成相同复杂晶体结构但粒子相互作用本质不同的系统的结晶路径,发现两者在多步结晶路径和局部结构演化上相似,归因于有效相互作用的相似性。

摘要:

利用分子动力学模拟,我们研究了两个示例系统的结晶路径,这两个系统形成相同的复杂晶体结构,但在粒子相互作用的本质上存在根本差异。一个系统由通过金属化合物特有的各向同性对势相互作用的点粒子组成,而另一个系统包含硬多面体,其相互作用源于涌现的熵力。尽管粒子相互作用的起源截然不同,我们发现两个系统都是多晶型的,并共享相同的晶体多晶型。此外,两个系统遵循相同的多步结晶路径,通过检查单粒子水平上的复杂结晶路径,我们发现两个系统的局部结构演化也是相似的。通过将硬粒子系统的相互作用映射到有效对势,我们发现这种相似性源于粒子相互作用在效果上的相似性。

英文摘要:

Using molecular dynamics simulations, we investigate the crystallization pathways of two exemplary systems that form the same complex crystal structure but differ fundamentally in the nature of their particle interactions. One system is composed of point particles interacting via an isotropic pair potential characteristic of metallic compounds, while the other system contains hard polyhedra whose interactions arise from emergent entropic forces. Despite the stark difference in the origins of the particle interactions, we find that both systems are polymorphic and share the same crystal polymorphs. Moreover, the two systems follow the same multistep crystallization pathways, and by examining the complex crystallization pathways on the single particle level, we find that the local structure evolution of the two systems is also similar. By mapping the hard particle system's interaction to an effective pairwise potential, we find that such resemblance arises from the particle interactions being effectively similar.

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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