报告题目 ：异质界面系统中的新颖超导电性研究
报告人：李炜（复旦大学）
报告时间：2024年9月27日（周五） 10：00 - 11：00
报告地点：北洋园校区 32 教 252 室
报告摘要：
At heterointerfaces, due to the presence of a pronounced interplay of Coulomb and interfacial electron-phonon interactions, the systems exhibit a wide spectrum of intriguing quantum phenomena that are inaccessible in their bulk individuals. In this talk, I will firstly give a brief introduction to the fascinating superconductivity, especially the emergent interfacial superconductivity based on the theory of symmetry breaking. Strikingly, the spontaneously broken rotational symmetry will be systemically discussed in the newly discovered KTaO3 heterointerface superconductor with strong spin-orbit coupling[1]. Furthermore, the coexistence of ferromagnetism and superconductivity will be discussed, which could open an avenue for realizing the topological superconductors[2]. At last, I will turn to present the discussion of the theoretically proposed and experimentally realized bipolaronic superconductivity at the heterointerface between the Mott insulating Ti2O3 and the polar semiconducting GaN via state-of-the-art heterostructure engineering[3,4].
报告人简介：
李炜，现为复旦大学物理学系青年研究员、博士生导师。主要从事低维量子功能材料体系中的新奇物态研究。目前，聚焦于异质界面系统中的新颖超导电性研究。迄今为止，已经在国际权威学术期刊Nature Communications、Advanced Materials、Nano Letter、ACS Nano、Physical Review系列等上发表高水平SCI科研论文近80篇。主持和参与过国家自然科学基金委重大科学仪器装备专项(两项)，中国科学院战略先导B类专项，上海市“科技创新行动计划”重大研究项目等。
References：
[1] G. Zhang, et al., Spontaneous rotational symmetry breaking in KTaO3 heterointerface superconductors, Nature Communications 14, 3046 (2023).
[2] Z. Ning, et al., Coexistence of ferromagnetism and superconductivity at KTaO3 heterointerfaces, Nano Letters 24, 7134 (2024).
[3] L. Wang, et al., Two-dimensional superconductivity at the titanium sesquioxide heterointerface, ACS Nano 16, 16150 (2022).
[4] G. Zhang, et al., Unique quantum metallic state in the titanium sesquioxide heterointerface superconductor, arXiv:2211.04035 (2022).
