Detail:

Abstract:
　　Recently, antiferromagnets (AFMs) are shown to be promising candidates for next-generation spintronic materials, as they hold potential to replace ferromagnets based on three salient features: 1) AFMs typically operate at Terahertz frequency. 2) AFMs bear a unique degree of freedom that refers to the chirality of spin wave. 3) AFMs have vanishing magnetization which helps in stabilizing and scaling down a magnetic device. In this talk, I will introduce recent progress in understanding these crucial properties of AFMs as well as their possible applications. I will discuss electrical, optical, thermal, and mechanical effects that are uniquely associated with antiferromagnets, which might be useful to create multifunctional Terahertz magnetic devices with low dissipation.

Biosketch：
　　Prof. Di Xiao received his B.S. degree in physics from Peking University in 2001, and Ph.D. from the University of Texas at Austin in 2007. He then worked at Oak Ridge National Laboratory, first as a postdoctoral researcher, then as a staff member in the Materials Science and Technology Division. In 2012, he joined Carnegie Mellon University as a tenure-track assistant professor, and is now an associate professor in the Physics Department. His research is focused on understanding and predicting material properties (transport, magnetic, and optical) from the viewpoint of Berry phase and topology, especially on nontrivial topology arising from spin-orbit coupling and many-body interactions and its applications in electronic and spintronic devices. He has published more than 70 peer reviewed papers, including 9 in the Nature sister journals, and 21 in Phys. Rev. Lett., with over 6500 citations.