题目： Topological Flat Bands in Material Science
报告人：马大帅 博士 （北京理工大学）
时间：2022/01/05
报告摘要：
Electrons whose energy dispersion is bound within a narrow window, i.e. "flat bands", are conjectured to exhibit a wide-range of interesting physics phenomena. Take the twisted bilayer graphene as a representative example, the flatness of the electronic bands plays a crucial role in the physics of, for example in the appearance of both the correlated insulator states and of the strong-coupling superconductivity. In this talk, I report on our recent progress in the topological flat bands. I will highlight two main results: (1) Topological flat bands with fragile band topology in 2D Line- and Split graph lattices, and (2) Catalogue of Flat Band of 3D materials.
参考文献：
[1] DS Ma, Y Xu, CS Chiu, N Regnault, AA Houck, Z Song, BA Bernevig. Phys. Rev. Lett. 125 (26), 266403 (2020).
[2] N Regnault, YF Xu, MR Li, DS Ma (#contributed equally), M Jovanovic, A Yazdani, S SP Parkin, C Felser, LM Schoop, NP Ong, RJ Cava, L Elcoro, ZD Song, B A Bernevig. Nature (Accepted).
[3] CS Chiu, DS Ma, ZD Song, BA Bernevig, AA Houck. Phys. Rev. Research 2 (4), 043414 (2020).
报告人简介：
马大帅博士先后于2015年和2021年在北京理工大学获学士学位和博士学位。博士期间师从姚裕贵教授。2019年-2020，国家留学基金委公派留学基金支持作为访问学者赴普林斯顿大学交流学习，期间师从B. Andrei Bernevig教授。马大帅博士长期从事物质的拓扑相以及拓扑材料新奇物理性质相关领域的研究。迄今为止，在本研究领域已经取得了一系列的研究成果，已在国际顶级期刊Nature、Phys. Rev. Lett.、Phys. Rev. B.等发表SCI论文20余篇。
