Observation of an acoustic octupole topological insulator

The concept of topological corner states in two dimensional topological insulators can be generalised to higher dimensions. Here, authors present a three dimensional acoustic metamaterial that exhibits the full hierarchy of topological multipole states including corner, hinge, surface and bulk state...

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Autores principales: Haoran Xue, Yong Ge, Hong-Xiang Sun, Qiang Wang, Ding Jia, Yi-Jun Guan, Shou-Qi Yuan, Yidong Chong, Baile Zhang
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2020
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Acceso en línea:https://doaj.org/article/ccd6f7f27f8842f49278c958279f070a
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Sumario:The concept of topological corner states in two dimensional topological insulators can be generalised to higher dimensions. Here, authors present a three dimensional acoustic metamaterial that exhibits the full hierarchy of topological multipole states including corner, hinge, surface and bulk states.