Abstract: 

Kagome materials exhibit a variety of rich physical properties due to the emergence of diverse electronic phases. The AV3Sb5 family has attracted considerable interest owning to the coexistence of charge ordering, superconductivity, and controversial time-reversal symmetry breaking. Recently, the bilayer kagome ScV6Sn6 has also drawn attention as it exhibits a charge density wave (CDW) with a distinct wave vector without superconductivity. This raises the open question: What governs the physical behavior of bilayer kagome ScV6Sn6? Here, we investigate this puzzle and related issues in broader bilayer-kagome systems, with emphasis on the exotic properties stemming from flat bands, potential CDW transitions, as well as their interplay with magnetism.

Resume:

冯晓龙博士，本科毕业于华中科技大学，博士毕业于新加坡科技设计大学，2023获得洪堡基金博士后项目资助，现于德国马克斯普朗克固体化学物理研究所Claudia Felser教授带领的拓扑量子化学研究组理论计算方向课题组长，主要通过有效模型及第一性原理的方法研究拓扑材料的电学、热学、磁学等性质。近期研究工作涉及量子材料中的声子不稳定，探索其中的电荷密度波相变。

邀请人：刘恩克（82649085，ekliu@iphy.ac.cn）

本报告由中科院-马普所极端条件量子材料与物理联合研究单元支持。