Hydrodynamic moiré superlattice

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-12-19 DOI:10.1126/science.adq2329

Guoqiang Xu, Xue Zhou, Weijin Chen, Guangwei Hu, Zhiyuan Yan, Zhipeng Li, Shuihua Yang, Cheng-Wei Qiu

引用次数: 0

Abstract

The structural periodicity in photonic crystals guarantees the crystal’s effective energy band structure, which is the fundamental cornerstone of topological and moiré physics. However, the shear modulus in most fluids is close to zero, which makes it challenging for fluids to maintain spatial periodicity akin to photonic crystals. We realized periodic vortices in hydrodynamic metamaterials and created a bilayer moiré superlattice by stacking and twisting two such vortex fluids. We observed energy delocalization and localization when the twist angles, respectively, result in the Pythagorean and non-Pythagorean triples in the fluidic moiré superlattice. Anomalous localization was found even in commensurate moiré fluids with large lattice constants that satisfy Pythagorean triples. Our work reports the moiré phenomena in fluids and opens an unexpected door to controlling the energy transfer, mass transport, and particle navigation through the elaborate dynamics of vortices in fluidic moiré superlattices.

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流体动力莫尔维尔超晶格。

光子晶体的结构周期性保证了晶体的有效能带结构，这是拓扑和摩尔纹物理学的基本基石。然而，大多数流体的剪切模量接近于零，这使得流体保持与光子晶体类似的空间周期性面临挑战。我们在流体动力超材料中实现了周期性旋涡，并通过堆叠和扭曲两种此类旋涡流体，创建了双层摩尔超晶格。当扭转角度分别导致流体莫伊里超晶格中的毕达哥拉斯三元组和非毕达哥拉斯三元组时，我们观察到了能量失焦和局部化现象。即使在满足毕达哥拉斯三元组的大晶格常数的相称摩尔流体中，也发现了反常的局部化现象。我们的工作报告了流体中的摩尔纹现象，为通过流体摩尔纹超晶格中涡旋的精细动力学控制能量传递、质量传输和粒子导航打开了一扇意想不到的大门。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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