直播时间：2025年8月1日（周五）20:00-21:30

 

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北京时间2025年8月1日晚八点，iCANX Talks 第238期邀请到了香港城市大学副教授Danfeng Li担任主讲嘉宾，香港科技大学助理教授Shiming Lei、北京大学助理教授Yingying Peng、南洋理工大学副教授Xiao Renshaw Wang，香港中文大学助理教授Qisi Wang担任研讨嘉宾，北京大学教授Haixia Zhang担任主持人。

 

这将是一场汇聚顶尖学者的盛会，共同探讨前沿科技与学术挑战！更多精彩，敬请期待！

 

【嘉宾介绍】

 

 

 

 

李丹枫‍

 

香港城市大学

 

Nickelates: Quest for High-temperature Superconductors

 

【Abstract】

 

Superconductors are remarkable materials that can conduct electricity with zero resistance, offering transformative potential for energy transmission, quantum computing, and magnetic levitation technologies. The discovery of high-temperature superconductors, particularly copper-based materials, cuprates, revolutionised the field decades ago, yet the quest for even better superconducting materials continues. In this talk, I will introduce nickelates, a newly discovered family of superconductors that shares intriguing similarities with the famous cuprates while displaying their own unique characteristics. I will discuss the significant challenges in synthesising these materials, which exist only as extremely thin films, and how we overcome these obstacles using innovative soft-chemistry approaches. The talk will explore the fascinating properties that make nickelates both similar to and distinct from cuprates, including the crucial role that rare-earth elements play in their behaviour. I will highlight how new synthetic methods are opening doors to previously inaccessible materials systems, and discuss the potential pathways toward discovering new high-temperature superconductors that could transform future technologies.

 

超导体是一类能以零电阻传导电流的非凡材料，在能源传输、量子计算和磁悬浮技术等领域具有颠覆性潜力。几十年前，铜基氧化物（即铜酸盐）高温超导体的发现曾震撼整个领域，但探寻性能更优异的超导体之旅从未停歇。本次报告中，我将介绍镍酸盐——一种最新发现的超导家族。它们与著名的铜酸盐既有耐人寻味的相似之处，又展现出独特的个性。我将重点讨论合成这类材料的巨大挑战：它们只能以极薄薄膜的形式存在；而我们通过创新的“软化学”策略，成功突破了这一瓶颈。报告将深入探讨镍酸盐与铜酸盐在物理性质上的异同，特别是稀土元素在调控其性能中的关键作用。我还将阐述新兴合成方法如何打开此前无法触及的材料体系大门，并展望发现下一代高温超导体的可能路径，这些路径或将重塑未来科技。

 

【BIOGRAPHY】

 

Prof. Danfeng Li is an Associate Professor in the Department of Physics and currently serves as Associate Dean for Research and Postgraduate Education in the College of Science at City University of Hong Kong (CityUHK). Prof. Li has received several prestigious awards and recognitions, including the AAPPS-APCTP Chen-Ning Yang Award in 2023, The Oxide Electronics Prize for Excellence in Research in 2024, the MIT Technology Review 35 Innovators Under 35 (China) in 2021, and Stanfords List of Worlds Top 2% Scientists in 2023 and 2024.Prof. Li obtained his B.Eng. from Zhejiang University and M.Phil. from The Hong Kong Polytechnic University. Shortly after earning his Ph.D. in the Department of Quantum Matter Physics at University of Geneva, he joined Stanford University as a Swiss National Science Foundation Postdoctoral Fellow. He joined CityUHK as an Assistant Professor in November 2020.Prof. Lis main research interests span across condensed-matter physics and materials science, focusing on atomic-scale fabrication of oxide heterostructures and nanomembranes, kinetic-based synthesis of unconventional quantum materials, low-dimensional superconductivity, oxide interfaces for emergent states, etc. In 2019, a team led by Prof. Li and Prof. Hwang discovered the first nickelate superconductor, which had been a target of continuous materials search for over three decades. This discovery has opened a new research area, which now marks nickelates as the new family of high-temperature superconductors.

 

李丹枫教授现任香港城市大学物理系副教授，并兼任理学院科研与研究生教育副院长。李教授屡获殊荣，包括2023年亚太物理学会—亚太理论物理中心杨振宁奖、2024年氧化物电子学卓越研究奖、2021年《麻省理工科技评论》中国区“35岁以下科技创新35人”，以及2023、2024年度斯坦福大学“全球前2%科学家”榜单。李教授本科毕业于浙江大学，获工学学士学位；其后于香港理工大学获哲学硕士学位；在瑞士日内瓦大学量子物质物理系取得博士学位后，以瑞士国家科学基金会博士后身份加入斯坦福大学。2020年11月，他加入香港城市大学任助理教授。李教授的研究横跨凝聚态物理与材料科学，聚焦氧化物异质结及纳米膜的近原子尺度构筑、基于动力学途径的非常规量子材料合成、低维超导、氧化物界面新奇量子态等方向。2019年，李教授与Hwang教授共同领衔的团队发现首个镍酸盐超导体——这一材料体系已被持续搜寻逾30年。该发现开辟了一个全新的研究领域，使镍酸盐正式跻身高温超导家族。