报告人：杨帆 教授（北京理工大学）

题目：Interaction driven exotic superconductivities in the quasicrystals

时间：2025年7月28日（周一）下午15：00

地点：理工楼1226

联系人：赵继泽

报告摘要：

The quasicrystal represents a type of long-range-ordered structure which possesses rotational symmetry but is not periodic. The recent revelation of superconductivity (SC) in the quasicrystalline materials has aroused great interests. Here, we report our series of works on the exotic SCs on QCs driven by electron-phonon (e-p) or electron-electron (e-e) interaction. Utilizing various methods including the quantum Monte-Carlo and the analytical perturbational theory, we found a series of novel superconducting phases such as the e-p coupling driven SC with strong pseudo-gap, chiral SC with spontaneous bulk current and the critical-nematic phases, which are unique to the QCs and absent or rare on periodic lattices. Our works open the door to study the exotic SCs on QCs.

个人简介：

杨帆，北京理工大学物理学院教授。2002年博士毕业于北京大学物理学院，2004年从清华大学高等研究中心博后出站，之后加入北京理工大学物理学院。2013年被聘为教授。杨帆的主要研究方向为强关联和超导理论。在铜基超导、量子自旋液体、铁基超导、魔角石墨烯、准晶电子态、镍基超导等领域从事研究多年。发表论文80余篇，其中包括14篇PRL/PRX/NC，7篇ESI高被引论文，被引用3000余次。