k1十年体育品牌

报告人：陈帅 (Max Planck Institute for the Physics of Complex Systems)

时 间：2026年8月13日(周四)下午15:00

地 点：线下-良乡校区 物理实验中心229会议室

摘要：Landau Fermi-liquid theory characterizes interacting metals through quasiparticles and their residual interactions, but this description is incomplete in topological bands, where quasiparticles also carry Bloch waves encoding Berry phase and quantum geometry. We formulate a topological Fermi-liquid theory for spinless fermions within an isolated band crossing the Fermi surface and derive the Landau functional through the Nozières--Luttinger construction. The instantaneous response of Bloch waves generates an anomalous Berry-connection coupling and an interaction-induced quantum-geometric current. The electromagnetic Ward identity combines this geometric current with the bare drift current to yield the conserved physical charge current. Therefore, the intrinsic anomalous Hall conductivity is fixed by the Berry-curvature integral of the dressed quasiparticle band while the Drude weight contains both conventional and quantum-geometric channels. In the Galilean-like limit, the Drude weight is protected against interaction renormalization. In the flat/narrow-band limit, transport is dominantly quantum geometric and can be thermally enhanced. These results establish quasiparticle occupations, Landau interactions, and the quantum geometry carried by quasiparticles as the fundamental low-energy ingredients of a topological Fermi liquid.

简历：Shuai Chen is currently a postdoctoral researcher at the Max Planck Institute for the Physics of Complex Systems. He graduated from Tianjin University in 2016 and completed his PhD in Institute for Advanced Study at Tsinghua University in 2021. From Sept 2021 to Oct 2023, he held a postdoctoral fellowship at the Hong Kong University of Science and Technology (HKUST), where he later became a Research Assistant Professor until June 2024. His research interests include strongly correlated systems and high-temperature superconductors, with a current focus on quantum geometry and interactions in flat-band systems.

联系方式：weizheng@bit.edu.cn

邀请人： 郑伟

网 址：http://physics.bit.edu.cn/

承办单位：k1十年体育品牌、先进光电量子结构设计与测量教育部重点实验室

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