题目：From antiferromagnets to altermagnets：functionalizing novel magnetic phases

报告人：Mathias Kläui

邀请人：袁怀洋

时间：2024年10月17日（周四）15:30

地点：紫金港校区海纳苑8幢215报告厅

摘要：

While known for a long time, antiferromagnetically ordered systems have previously been considered, as “interesting but useless”. However, since antiferromagnets potentially promises faster operation, enhanced stability and higher integration densities, they could potentially become a game changer for new spintronic devices. Here we show how antiferromagnets can be used as active spintronics devices by demonstrating the key operations of “reading”, “writing”, and “transporting information” in antiferromagnets. 

Going beyond antiferromagnets, we develop altermagnetic materials. This recently identified class magnets with collinear antiferromagnetic magnetic order can exhibit spin splitting and particular spin transport properties and torques. Here we demonstrate the spin splitting in RuO2 and CrSb and analyze particular symmetries of the Hall signal in the altermagnet hematite.

个人简介：

Mathias Kläui is professor of physics at Johannes Gutenberg-University Mainz and adjunct professor at the Norwegian University of Science and Technology.

He received his PhD at the University of Cambridge, after which he joined the IBM Research Labs in Zürich. He was a junior group leader of an ERC Starting Grant at the University of Konstanz and then became associate professor in a joint appointment between the EPFL and the PSI in Switzerland before moving to Mainz. His research covers from blue sky fundamental science to applied projects with major industrial partners. He has published more than 400 articles and was selected as a Clarivate Highly Cited Researcher in 2024. He is a Fellow of the IEEE, IOP and APS, IEEE, EurASc and was selected as an IEEE Magnetics Society Distinguished Lecturer.

Contact details and more information at www.klaeui-lab.de