| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Hybrid Skin-Topological Effect Induced by Eight-Site Cells and Arbitrary Adjustment of the Localization of Topological Edge States |
| Jianzhi Chen1, Aoqian Shi1, Yuchen Peng1, Peng Peng1, and Jianjun Liu1,2* |
1Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China
2Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 511300, China
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| Cite this article: |
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Jianzhi Chen, Aoqian Shi, Yuchen Peng et al 2024 Chin. Phys. Lett. 41 037103 |
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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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Received: 26 December 2023
Editors' Suggestion
Published: 18 March 2024
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| PACS: |
03.67.Lx
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(Quantum computation architectures and implementations)
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03.67.-a
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(Quantum information)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.67.Pp
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(Quantum error correction and other methods for protection against decoherence)
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