时间：1月15日（周四）上午10：00

地点：勤园20-518

报告简介：

The anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) are two phenomena that describe the perpendicular voltage drop that occurs when a magnetic material is magnetized in the presence of an applied current and a temperature gradient. These effects offer potential applications in future electronic devices and thermoelectric energy conversion. This presentation will discuss our research on the giant AHE and ANE observed in multiple Ce-based, ferromagnetic intermetallic compounds. We observed a massive anomalous Hall conductivity and anomalous Nernst coefficient, which can reach values as high as 1000 Ω^-1 cm^-1 and 10 μV K^-1, respectively. Unlike conventional heavy-fermion compounds, where the AHE is caused by coherent skew scattering, the giant anomalous effects observed in our study stem from a strong Berry curvature field resulting from the strong hybridization between the f and conduction electrons in a ferromagnetic order. Our findings pave the way for exploring correlation-driven topological responses in an itinerant ferromagnetic Kondo lattice environment.

报告人简介：

贾爽，2000年在北京大学获得物理学学士学位，2008在美国爱荷华州立大学获得物理学博士学位，2008-2012年在美国普林斯顿大学从事博士后研究，2012至今为北京大学副教授、教授。从事凝聚态物理研究，主要关注各种拓扑电子材料的探索合成和表征。自2007年起在各类国际学术刊物上发表论文一百余篇，总引用超过一万次，2020-2025年度入选科睿唯安（Clarivate Analytics） 全球“高被引科学家”名单。2022年获取国家自然科学基金委青年科学基金A类项目资助。