报告题目：A Tale of Two Bilayers

报告人：周桐 (Benjamin T. Zhou) 助理教授

邀请人：谢弘超 教授

时间：2025年5月28日 15:30 - 17:00

地点：广州国际校区 C2a-207

欢迎广大师生踊跃参加。

报告摘要：

Recent developments in van der Waals bilayers with unusual stacking order have seen the emergence of rich correlated and topological quantum phenomena that are otherwise absent in each isolated monolayer. In the first part of the talk, I will talk about our recent theoretical discovery of exotic topological f±if'-wave superconductivity emergent in a maximally twisted double-layer of unconventional yet topologically trivial superconductors. I will discuss its distinctive experimental signatures and its potential for fault-tolerant quantum computing. The second part of the talk is devoted to hidden quantum-geometric effects in sliding ferroelectrics in which the unusual rhombohedral stacking of two non-polar honeycomb monolayers leads to a bilayer with nonzero polarization. I will explain how the origin of the stacking polarization can be understood by the physics of the celebrated Su-Shrieffer-Heeger (SSH) model, and discuss its implications on the materials’ anomalous transport properties.

报告人简介：

周桐，2024年12月加入香港科技大学（广州），现任先进材料学域和量子科技中心助理教授、博士生导师。分别于2013年和2018年于香港科技大学取得物理学学士与物理学博士学位，随后获香港裘槎基金会博士后奖赴加拿大英属哥伦比亚大学，在Stewart Blusson量子物质研究院从事博士后研究。研究方向为理论凝聚态物理与量子材料物理，主要聚焦物质的拓扑相与量子几何、非常规与拓扑超导、电子关联、介观电子输运等，在二维伊辛超导、轨道-自旋-耦合超导、滑移铁电性微观起源等课题上提出的原创性理论获领域内广泛认可并得到实验证实。近年来在Nature Photonics、Nature Communications, Physical Review Letters等国际学术期刊发表论文。