Observation of multiple rotons and multidirectional roton-like dispersion relations in acoustic metamaterials

• Main Authors: Zhu, Zhenxiao, Gao, Zhen, Liu, Gui-Geng, Ge, Yong, Wang, Yin, Xi, Xiang, Yan, Bei, Chen, Fujia, Shum, Perry Ping, Sun, Hong-Xiang, Yang, Yihao
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2023
• Subjects: Science::Physics; Long-Range Interaction; Roton-Like Dispersion
• Online Access: https://hdl.handle.net/10356/169453
• Institution: Nanyang Technological University

Roton dispersion relations were firstly predicted by Landau and have been extensively explored in correlated quantum systems at low temperatures. Recently, the roton-like dispersion relations were theoretically extended to classical acoustics, which, however, have remained elusive in reality. Here,...