A Unified Itinerant Mechanism for SDW and Superconductivity in High-Tc Multilayer Nickelates

报告题目：A Unified Itinerant Mechanism for SDW and Superconductivity in High-Tc Multilayer Nickelates

报告人：吴贤新研究员  中科院理论所

报告时间：2026年5月13日下午1:30-2:30

报告地点：致远楼301室

报告摘要：The discovery of high-temperature superconductivity in bilayer nickelate under pressure, and more recently in compressively strained thin films at ambient pressure, has sparked significant research interest. So far, the origin and underlying mechanisms remain elusive. We study the microscopic origins of superconductivity and spin density wave (SDW) in bilayer nickelates from an intermediate coupling perspective. Our findings establish a unified scenario for both bulk and thin-film systems, highlighting the essential role of opposite-mirror-parity scattering. This scenario consistently accounts for the superconducting dome as a function of pressure and doping in bilayer systems and the intriguing SDW in trilayer nickelates. Moreover, the electron phonon coupling involving unique out-of-plane breathing modes cooperate with electronic correlations to enhance pairing and raise Tc. Nonlocal Coulomb interactions can reshape the correlated electronic states and promote interlayer pairing rather than suppress it. Potential experimental implications and detection of pairing symmetries will also be discussed. Our results establish a unified microscopic scenario for superconductivity and magnetism in pressurized bulk and strained thin-film nickelates from an itinerant perspective.

报告人简介：吴贤新，中科院理论物理研究所研究员。2016年于中科院物理研究获得博士学位，2016-2022年先后在德国维尔茨堡大学和马克斯·普朗克固体研究所从事博士后研究，2022年加入理论所。长期致力于高温超导、关联电子体系与拓扑物态理论研究，并与实验紧密合作。主要学术贡献包括：预言了铁基高温超导体的拓扑性质并获实验证实；提出了基于该体系实现高阶拓扑超导和马约拉纳态的新方案；系统研究了笼目超导体、镍基高温超导体等中体系的新奇电子关联态，阐明了其中关联物态与非常规配对的微观机制。在Nature、Nature Physics、PRL等国际学术期刊发表论文90余篇，总引用超过7500次。获国家基金委优青（海外）、科学院百人计划、国家重点研发计划青年等项目资助。