Non-Hermitian route to higher-order topology in an acoustic crystal

• Main Authors: Gao, He, Xue, Haoran, Gu, Zhongming, Liu, Tuo, Zhu, Jie, Zhang, Baile
• 其他作者: School of Physical and Mathematical Sciences
• 格式: Article
• 語言: English
• 出版: 2022
• 主題: Science::Physics; Topological Insulators; Non-Hermitian Physics
• 在線閱讀: https://hdl.handle.net/10356/154809
• 機構: Nanyang Technological University

Topological phases of matter are classified based on their Hermitian Hamiltonians, whose real-valued dispersions together with orthogonal eigenstates form nontrivial topology. In the recently discovered higher-order topological insulators (TIs), the bulk topology can even exhibit hierarchical featur...