2022年8月25日上午，美国犹他大学材料科学与工程系刘锋教授应邀为我校师生作题为“Negative Interatomic Force Constant Manifested by Topological Phonon Flat Band”的线上学术报告。会议由国际前沿科学研究院副院长张助华教授主持，前沿院及其他学院的百余名师生参加了此次会议。

报告中，刘锋教授主要介绍了集体晶格耦合 (Collective lattice coupling，CLC)来建立声子和能带拓扑的一一对应关系，带给大家对能带拓扑性全新的统一的理解认识。他从电子结构的拓扑出发类比声子拓扑，讲述了团队在拓扑声子平带方面的最新研究进展，这些新工作为声子拓扑材料的设计和应用提供了崭新的研究方向。报告中，刘锋教授通过对自身科研、教学工作的精彩讲述，诠释了一名科研优秀科学家所必须具备的开放性思维和见微知著的科研品质。最后，在交流互动环节，刘锋教授详细地回答了师生们的提问并与他们进行了深入的交流讨论。本次报告会使得老师和同学们深受启发，有助于大家加深自身的物理基础和挖掘创新科研思维，助力今后科研工作的良性发展。

Feng Liu, Distinguished and Ivan B. Cutler Professor of Department of Materials Science and Engineering, University of Utah. He received his PhD in Chemical Physics from Virginia Commonwealth University in 1990. Prof. Liu is a fellow of American Physical Society and recipient of Senior Humboldt Award. His research interest lies in theoretical and computational studies of low-dimensional nano and quantum materials, with a most recent focus on topological and flat-band materials. He is also co-founder of two start-up companies.