【学术视频】第四届全国热传导研讨会 | 清华大学徐勇副教授

图 | 徐勇

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The marriage of topology and phononics brings an emerging field “topological phononics”, which utilizes novel quantum degrees of freedom like the Berry phase, pseudospin and topology for controlling phonons in unprecedentedly new ways. In this talk, we will first review recent research progress of this intriguing field. Then after discussing the fundamental concepts/methods of topological phononics, we will introduce our recent works on exploring nontrivial topological states of phonons, including quantum (anomalous) Hall-like states with broken time reversal symmetry (TRS), pseudo-spins and 2D/3D topological states of phonons with no need of TRS breaking. Finally we will give an outlook for the future of the field.

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