Second-order topology and multidimensional topological transitions in sonic crystals

• Published in: Nature physics Vol. 15; no. 6; pp. 582 - 588
• Main Authors: Zhang, Xiujuan, Wang, Hai-Xiao, Lin, Zhi-Kang, Tian, Yuan, Xie, Biye, Lu, Ming-Hui, Chen, Yan-Feng, Jiang, Jian-Hua
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.06.2019; Nature Publishing Group
• Subjects: 639/301/119/2792/4128; 639/766/25/3927; Acoustics; Atomic; Classical and Continuum Physics; Complex Systems; Condensed Matter Physics; Crystals; Mathematical and Computational Physics; Metamaterials; Molecular; Optical and Plasma Physics; Phase transitions; Physics; Physics and Astronomy; Quantum Hall effect; Symmetry; Theoretical; Topological insulators; Topology

Topological insulators with unique edge states have revolutionized the understanding of solid-state materials. Recently, higher-order topological insulators (HOTIs), which host both gapped edge states and in-gap corner/hinge states, protected concurrently by band topology, were predicted and observe...