报告主题：Disorder-induced superconductor-indulator phase transition in iron-based superconductor

主 讲 人：何冠阳 助理研究员（上海科技大学）

主 持 人：庄泽坤

时 间：2026年4月14日（二）16：00

地 点：致知楼701

嘉宾简介：

Guanyang He obtained the bachelor degree from Wuhan University in 2014, then he graduated from Brown University with a PhD degree in 2021, followed by a postdoctoral study in Peking University. After that, He joined the laboratory of topological physics in ShanghaiTech University in 2024. His recent interests include iron-based superocnductors and topological superconducting heterostructures.

报告摘要：

The superconductor-insulator transition as a paradigm of quantum phase transitions can be conventionally driven by magnetic field and carrier density, whereas the role of disorder in the transition is not well understood due to the complicated interplay between superconductivity and electron localization. In this report, I will describe our method of controllably introducing disorder in a two-dimensional high-temperature superconductor, by depositing iron clusters onto the superconducting monolayer Fe(Te,Se) crystalline film. I will then discuss the spectral evolution from superconducting gaps to insulating gaps with increasing disorder, detected by low-temperature scanning tunneling spectroscopy.