题目：Non-Relativistic Spin Currents and Torques in Antiferromagnets

报告人：Jakub Železný （捷克科学院）

时间：2025年10月20日（周一），上午10：00 - 12：00

地点：李薰楼457室

摘要：Contrary to the early understanding of antiferromagnets as limited compared to ferromagnets, a rich landscape of phenomena in antiferromagnets has been demonstrated that could be utilized for various spintronics functionalities. Here, we discuss recent advances in understanding of how electrical current can induce spin currents or spin torques in antiferromagnetic systems, focusing primarily on non-collinear antiferromagnets and on phenomena that originate from the non-collinear order without requiring the relativistic spin-orbit coupling. We show that antiferromagnets can host spin-polarized currents and that these can be utilized for magnetic junctions, that antiferromagnets can be used for spin-charge conversion, potentially even without any spin loss, and that a non-relativistic current-induced torque analogous to the spin-orbit torque can exist in antiferromagnets.

报告人简介：Jakub Železný is a group leader at the Institute of Physics of the Czech Academy of Sciences in Prague. He received his Ph.D. from Charles University in the Czech Republic in 2016, and after that he was a postdoctoral fellow at the Max Planck Institute for Chemical Physics of Solids in Germany. He works on theoretical condensed-matter physics, primarily in the field of spintronics. His research mainly focuses on spintronics in antiferromagnetic and other unconventional magnetic materials and on the role that symmetry plays in transport phenomena.