树枝状声子晶体的谷锁定边缘态及角态

doi:10.13438/j.cnki.jdzk.2025.06.005

吉首大学学报（自然科学版） ›› 2025, Vol. 46 ›› Issue (6): 35-41.DOI: 10.13438/j.cnki.jdzk.2025.06.005

树枝状声子晶体的谷锁定边缘态及角态

刘舒淇，刘垣利，孔鹏，赵鹤平

(1.吉首大学物理与机电工程学院，湖南吉首 416000；2. 湖南财政经济学院，湖南长沙 410205)

出版日期:2025-11-25 发布日期:2025-12-17
作者简介:刘舒淇(2001—)，女，河南濮阳人，吉首大学物理与机电工程学院硕士研究生，主要从事拓扑声学物理研究

Valley-Locked Edge States and Corner States in Dendritic Phonon Crystals#br#

LIU Shuqi,LIU Yuanli,KONG Peng,ZHAO Heping

(1.Department of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.Hunan University of Finance and Economics,Changsha 410205,China)

Online:2025-11-25 Published:2025-12-17

摘要/Abstract

摘要：为了研究二维高阶拓扑绝缘体声波传播特性，设计了一种具有C_3v对称性的三阶树枝状结构谷声子晶体，通过旋转散射体打破空间对称性，成功实现了谷霍尔边缘态.在此基础上，构建了Zigzag界面拓扑波导和三角形角结构，并分析了声波的传输行为.结果表明，拓扑波导中声场能量能够有效限制在Zigzag界面，三角形角结构中出现了具有谷可切换性与选择性的角态.

关键词： 声子晶体, 边缘态, 拓扑输运, 角态

Abstract: To study the acoustic wave propagation characteristics of two-dimensional higher-order topological insulators,a third-order dendritic valley phononic crystal structure with C3v symmetry was designed.By rotating the scatterers to break spatial symmetry,the valley Hall edge states were successfully realized.On this basis,a Zigzag interface topological waveguide and a triangular corner structure were constructed,and their acoustic wave transmission behaviors were analyzed.The results show that in the topological waveguide,the acoustic waves are effectively localized at the Zigzag interface;in the triangular corner structure,corner states with valley switchability and selectivity appear.

Key words: phonon crystal, edge state, topological transport, corner state

刘舒淇, 刘垣利, 孔鹏, 赵鹤平. 树枝状声子晶体的谷锁定边缘态及角态[J]. 吉首大学学报（自然科学版）, 2025, 46(6): 35-41.

LIU Shuqi, LIU Yuanli, KONG Peng, ZHAO Heping. Valley-Locked Edge States and Corner States in Dendritic Phonon Crystals#br#[J]. Journal of Jishou University(Natural Sciences Edition), 2025, 46(6): 35-41.

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树枝状声子晶体的谷锁定边缘态及角态

Valley-Locked Edge States and Corner States in Dendritic Phonon Crystals#br#

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