Hybrid Skin-Topological Effect Induced by Eight-Site Cells and Arbitrary Adjustment of the Localization of Topological Edge States

IF 3.5 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Chinese Physics Letters Pub Date : 2024-03-01 DOI:10.1088/0256-307x/41/3/037103
Jianzhi Chen, Aoqian Shi, Yuchen Peng, Peng Peng, Jianjun Liu
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Abstract

Hybrid skin-topological effect (HSTE) in non-Hermitian systems exhibits both the skin effect and topological protection, offering a novel mechanism for localization of topological edge states (TESs) in electrons, circuits, and photons. However, it remains unclear whether the HSTE can be realized in quasicrystals, and the unique structure of quasicrystals with multi-site cells may provide novel localization phenomena for TESs induced by the HSTE. We propose an eight-site cell in two-dimensional quasicrystals and realize the HSTE with eight-site nonreciprocal intracell hoppings. Furthermore, we can arbitrarily adjust the eigenfield distributions of the TESs and discover domain walls associated with effective dissipation and their correlation with localization. We present a new scheme to precisely adjust the energy distribution in non-Hermitian quasicrystals with arbitrary polygonal outer boundaries.
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八位单元诱导的混合皮肤-拓扑效应以及拓扑边缘态定位的任意调整
非赫米提系统中的混合表皮-拓扑效应(HSTE)同时表现出表皮效应和拓扑保护,为电子、电路和光子中拓扑边缘态(TES)的定位提供了一种新的机制。然而,HSTE 能否在类晶体中实现仍不清楚,而具有多位元胞的类晶体的独特结构可能会为 HSTE 诱导的拓扑边缘态提供新的定位现象。我们提出了二维准晶体中的八位元胞,并实现了具有八位元非互惠胞内跳变的 HSTE。此外,我们还可以任意调整 TES 的特征场分布,并发现与有效耗散相关的畴墙及其与定位的相关性。我们提出了一种新方案,用于精确调整具有任意多边形外边界的非赫米梯准晶体的能量分布。
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来源期刊
Chinese Physics Letters
Chinese Physics Letters 物理-物理:综合
CiteScore
5.90
自引率
8.60%
发文量
13238
审稿时长
4 months
期刊介绍: Chinese Physics Letters provides rapid publication of short reports and important research in all fields of physics and is published by the Chinese Physical Society and hosted online by IOP Publishing.
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