Projectively enriched symmetry and topology in acoustic crystals

• Main Authors: Xue, Haoran, Wang, Zihao, Huang, Yue-Xin, Cheng, Zheyu, Yu, Letian, Foo, Y. X., Zhao, Y. X., Yang, Shengyuan A., Zhang, Baile
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics; Electric Insulators; Acoustic Crystal
• Online Access: https://hdl.handle.net/10356/161259
• Institution: Nanyang Technological University

Symmetry plays a key role in modern physics, as manifested in the revolutionary topological classification of matter in the past decade. So far, we seem to have a complete theory of topological phases from internal symmetries as well as crystallographic symmetry groups. However, an intrinsic element...