报告题目 (Title)：More is different: the beauty of multiband in iron-based superconductors（多者异也：铁基超导体中的多带之美）

报告人 (Speaker)： 丁洪 院士

报告时间 (Time)：2025年4月24日(周四) 14:00-16:00

报告地点 (Place)：校本部G601

邀请人(Inviter)：胡晓 教授

主办部门：量子科技研究院/理学院物理系

报告摘要：

In a paradigm-shifting article “More is different” in 1972, Phil Anderson pointed out that new properties can emerge from a many-body system, which cannot be derived from the constituent particles. In this talk I would argue that even two or three can be regarded as “more” in the world of superconductors. I will highlight the unnoticed beauty of multiband of iron-based superconductors, including 1. Emergence of topological band which coexists with superconductivity, leading to the discovery of Majorana zero mode; 2. Interplay of multicomponent superconductivity, leading to the discoveries of exotic paring with time-reversal symmetry breaking and fractional vortex; 3. Contribution of Hund coupling towards pairing in this unique class of superconductors.