Observation of acoustic Floquet π modes in a time-varying latticeRemoveZhao-xian Chen, An Chen, Yu-Gui Peng, Zheng-wei Li, Bin Liang, Jing Yang, Xue-Feng Zhu, Yan-qing Lu, and Jian-chun ChengPhys. Rev. B 109, L020302 (2024)
