Acoustic higher-order topological insulator on a kagome lattice

• Main Authors: Xue, Haoran, Yang, Yahui, Gao, Fei, Chong, Yidong, Zhang, Baile
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2020
• Subjects: Science::Physics; Topological Insulators; Acoustic Metamaterial
• Online Access: https://hdl.handle.net/10356/138208
• Institution: Nanyang Technological University

Higher-order topological insulators1-5 are a family of recently predicted topological phases of matter that obey an extended topological bulk-boundary correspondence principle. For example, a two-dimensional (2D) second-order topological insulator does not exhibit gapless one-dimensional (1D) topolo...