腾讯会议：412-329-609，密码：4569

报告摘要：
In crystalline solids, the electronic structure is usually dictated by the atomic lattice. Layered electrides break this rule by hosting the anionic electron lattices (AELs). Using angle-resolved photoemission spectroscopy, we study two isostructural layered electrides, YCl and LaCl. In YCl, excess valence electrons deconfine from the cation framework to form a standalone AEL that realizes a dice lattice. Our measurements unambiguously uncover the long-sought dice-lattice band structure1, including a flat band at the Fermi level, and establish YCl as a prototype dice metal. In contrast, isostructural LaCl exhibits a fully reconstructed electronic structure, where direct hopping channels between the AEL and the La cation sites are activated, rewiring the lattice network and reshaping the low-energy band structure compared to YCl. This radical divergence reveals the AEL as a novel tuning knob for electronic structure design.

[1] S. Geng, H. Li et al. Nat. Commun. 17, 2213 (2026)

报告人简介：
Dr. Haoxiang Li is currently an assistant professor of Advanced Materials Thrust at HKUST(GZ). He received his Ph.D. degree of physics from the University of Colorado Boulder. Before joining HKUST (GZ), he was a postdoctoral researcher at the Oak Ridge National Laboratory.  Dr. Li's research focuses on exploring novel quantum materials using angle-resolved photoemission spectroscopy and various X-ray scattering techniques. His current research focus is on the exploration of dice lattice flat band and other exotic electronic states arising from the anionic electron lattice in electrides.

邀请人：吴泉生 特聘研究员

联系人：魏佳 secuf_wj@iphy.ac.cn