学术报告（2024年11月26日10:00）：准晶上电子相互作用驱动的超导电

主持人：姚道新教授

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 Al-Zn-Mg and Ta-Te quasi-crystals (QCs) has aroused great interests. Here, we report our series of works on the electron interaction driven exotic SCs on QCs. We generalize the Kohn-Luttinger mechanism for repulsive-interaction-driven SCs from periodic lattices to QCs, and classify the pairing symmetries. Consequently, we found a series of novel superconducting phases such as the gapless SC with finite zero-energy density of state, the chiral SC with spontaneous bulk super current and the nematic SC with quasi-nematic vestigial phases. These exotic superconducting phases are unique to the QCs and are absent or rare in conventional crystalline materials.

报告人简历：杨帆是北京理工大学bet亚洲登录官方网站教授。2002年博士毕业于北京大学bet亚洲登录官方网站，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bet亚洲登录官方网站。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70余篇，其中包括11篇Phys. Rev. Lett.和1篇 Nat. Commun，被引用3000余次。