A universal state and its relaxation mechanisms of long-range interacting polygons
A universal state and its relaxation mechanisms of long-range interacting polygons
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长程相互作用多边形的普适状态及其松弛机制
DOI：
10.1038/s41467-019-09795-6
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发表时间：
2019
影响因子：
16.6
通讯作者：
Xu Lei
中科院分区：
文献类型：
--
作者：
Shen Hongchuan;Tong Hua;Tan Peng;Xu Lei
使用多边形磁性粒子，我们进行实验，探索空间填充性能的各向异性块与长程相互作用。与以前的研究相比，我们得到了令人惊讶的发现，我们的系统的结构不依赖于积木的形状：一个单一的状态，六边形的塑料晶体，出现作为一个普遍的吸引子，为广泛的不同的多边形。这种强大的粒子形状的独立性出现的相互作用超越最近的邻居。粒子形状在系统弛豫过程中起着重要作用，并通过粒子顶点产生的内部粗糙度这一微观控制参数来决定系统的基本弛豫动力学。因此，我们的研究揭示了一个新的模式形成的范例，其中粒子形状在静态结构中发挥的作用很小，但决定了基本的弛豫动力学。由于普遍存在的长程相互作用和各向异性的积木，我们的发现可能会揭示新的光涉及结构形成，自组装和包装的各种问题。
Using polygonal magnetic particles, we conduct experiments to explore the space-filling properties of anisotropic blocks with long-range interactions. In contrast to previous studies, we obtain the surprising finding that our systems’ structures do not depend on the shape of building blocks: a single state, the hexagonal plastic crystal, appears as a universal attractor for a wide range of different polygons. This robust particle-shape independency appears as the interactions go beyond nearest neighbors. Particle shape plays an essential role in system relaxation, and determines the basic relaxation dynamics through a microscopic control parameter, internal roughness, produced by particle vertices. Thus our study reveals a new pattern-forming paradigm, in which particle shape plays little role in the static structure but determines the essential relaxation dynamics. Due to the ubiquity of long-range interactions and anisotropic building blocks, our discovery may shed new light on diverse problems involving structure formation, self-assembly, and packing.