报告题目： Recent progress in the hybrid of superconductors with quantum anomalous Hall systems
报告人：冯洋 北京量子信息科学研究院 fengyang@baqis.ac.cn
报告时间：2024年6月7日星期五，10：00-11：00点
报告地点：致远楼301
报告邀请人：陈垂针
Abstract: The hybrid of s-wave superconductors (SCs) and quantum anomalous Hall (QAH) systems shows promise for realizing chiral topological superconductivity and Majorana zero modes. However, to date, evidence of superconducting proximity effects in such hybrid systems remains elusive, mainly due to the adverse effects of magnetism and disorder on the superconducting phase. In this talk, I will outline the experimental difficulties in fabricating SC-QAH hybrids, and provide direct evidence of anomalous quantum oscillations in supercurrents flowing through QAH-based Josephson junctions. I will then present results demonstrating the superconducting diode effect in the SC-QAH hybrid, which signals an edge-dominant supercurrent. Finally, I will describe how to assess QAH film quality for investigating chiral topological superconductivity, using an experimental phase diagram that captures the complex interplay between film thickness, surface hybridization, and disorder. The talk will conclude with a discussion on the potential for experimental insights and unique properties relevant to chiral Majorana edge mode and topological quantum computation.
CV：Yang Feng obtained his Ph.D. from the Department of Physics at Tsinghua University in 2018. Following this, he conducted postdoctoral research at the State Key Laboratory of Surface Physics and the Department of Physics at Fudan University from 2018 to 2021. In 2021, he joined the Beijing Academy of Quantum Information Sciences (BAQIS) as an associate researcher. the research primarily centers on optimizing the performance of quantum anomalous Hall (QAH) systems, investigating topological superconductivity in the hybrid of superconductors with QAH systems, and realizing the topological quantum bits (qubits) based on QAH systems.