首页|The higher-order topological pumping explored in the 2D acoustic crystal

The higher-order topological pumping explored in the 2D acoustic crystal

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The topological pumping has been instrumental in advancing our understanding of topological phase transitions in various physical systems,which can be extended to uncover intriguing higher-order topological phases in the lower-dimensional system.Here,we propose a theoretical exploration of topological dipole pumping on an acoustic square superlattice by cyclically modulating intracell couplings,which shares the topological nature of an extended three-dimensional system with chiral hinge states.Using the multipole chiral numbers,we characterize the higher-order topological phases that arise during the evolution.The evolution of topological phase transitions is verified by numerical simulations and shows corner states are transferred across the bulk.Our findings can inspire the construction of chiral hinge states in artificial crystals,opening up new possibilities for the design of devices allowing the unidirectional propagation of sound.

topological phases of matterThouless pumpingacoustic metamaterial

Yanqiu Wang、Bin Liang、Jianchun Cheng

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Key Laboratory of Modern Acoustics,Ministry of Education,Institute of Acoustics,Department of Physics,Nanjing University,Nanjing 210093,China

Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHigh-Performance Computing Center of Collaborative Innovation Center of Advanced MicrostructuresPriority Academic Program Development of Jiangsu Higher Education Institutions

2022YFA14044021163400681127901

2024

10.1007/s11433-023-2248-2

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(2)
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