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arXiv 2406.04763cond-mat.mes-hallphysics.optics
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高阶时间位错拓扑模式的观测

Observation of higher-order time-dislocation topological modes

Jia-Hui Zhang, Feng Mei, Yi Li, Ching Hua Lee, Jie Ma, Liantuan Xiao, Suotang Jia

AI总结:

本文在三维电路超材料中实现二维Floquet高阶拓扑相,首次从理论与实验上观测到由时间位错与Floquet能带拓扑相互作用诱导的π模式拓扑角模式,揭示了时间位错处的空间局域性。

摘要:

由空间位错与动量空间拓扑相互作用产生的拓扑位错模式近年来引起了广泛关注。在此,我们从理论和实验上展示了由时间位错与Floquet能带拓扑相互作用诱导的时间位错拓扑模式。通过利用额外的物理维度来表示频率空间晶格,我们在三维电路超材料中实现了二维Floquet高阶拓扑相,并观测到时间位错诱导的π模式拓扑角模式。有趣的是,尽管跨越时间位错的平面内晶格耦合是均匀的,所实现的时间位错拓扑模式仍表现出在时间位错处的空间局域性。我们的研究为探索由实空间、时间空间和动量空间拓扑之间的相互作用所实现的拓扑现象开辟了新途径。

英文摘要:

Topological dislocation modes resulting from the interplay between spatial dislocations and momentum-space topology have recently attracted significant interest. Here, we theoretically and experimentally demonstrate time-dislocation topological modes which are induced by the interplay between temporal dislocations and Floquet-band topology. By utilizing an extra physical dimension to represent the frequency-space lattice, we implement a two-dimensional Floquet higher-order topological phase and observe time-dislocation induced $π$-mode topological corner modes in a three-dimensional circuit metamaterial. Intriguingly, the realized time-dislocation topological modes exhibit spatial localization at the temporal dislocation, despite homogeneous in-plane lattice couplings across it. Our study opens a new avenue to explore the topological phenomena enabled by the interplay between real-space, time-space and momentum-space topology.

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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