主讲人：王向荣，香港中文大学（深圳）教授
时 间：2026年9月18日15:00
地 点：物电学院A栋334
联系人：王宪思
讲座摘要：The universal features for charge/spin current interconversion involved tensor order parameters and for magnetoresistance controlled by two vectors in magnetic multilayers were predicted. The charge/spin current interconversion termed as anomalous spin-Hall effect and anomalous inverse spin-Hall effect were confirmed by recent experiments. The universal anisotropic magnetoresistance (UAMR) and unidirectional magnetoresistance (UMR) observed in all nanoscale bilayers or multilayers can naturally arise from electron transport influenced by the magnetization presented in the magnetic material and the interfacial field inherent in heterostructures. Specifically, UAMR represents current-independent resistance (resistivity) in bilayers, while UMR is characterized by resistance that is proportional to the current, even though electron transport in the bilayers is a linear response to high current densities and the induced thermal gradients. These predictions align well with existing experimental results and with observations in layered Van der Waals magnetic films and have also been confirmed by first-principles calculations. Furthermore, this framework offers a universal perspective that not only bridges UMR and UAMR effects, enhancing our understanding of spin-dependent transport phenomena in bilayers, but also provides a unified picture for well-known MR phenomena: the usual AMR in polycrystalline ferromagnets as a consequence of one-vector physics, and AMR in ferromagnetic single crystals as a consequence of four-vector physics.
主讲人简介：王向荣教授1984年于武汉大学获得学士学位，于罗切斯特大学1986年获得硕士学位和1990年获得博士学位。1990至1992年在明尼苏达大学进行博士后研究，1992年加入香港科技大学物理系。现在于香港中文大学（深圳）担任教授。王教授担任过中国科学院固体物理研究所、北京师范大学、山东大学、武汉大学、西安交通大学、电子科学大学、南昌大学等多所大学和研究所的客座教授和讲座教授。2010年4月获山东省政府授予泰山海外教授。王教授也曾经是中国科学院物理研究所理论与计算物理部顾问委员会成员。王向荣教授的研究兴趣在揭示凝聚态物质中新颖物理现象背后的物理原理。目前主要包括磁结构动力学、拓朴物理、磁性材料中的电子输运（如各向异性和异常各向异性磁阻、电荷自旋互变等）。
