Report Time: November 9, 2022 15:00--16:00

Tencent Meeting: 923-527-468 (https://meeting.tencent.com/dm/Xod2Teo0T6AC)

Report Abstract: Two-dimensional ferromagnets have attracted much attention for their important applications in spintronics devices. From the perspective of device applications, there is an urgent need to find more experimentally easy-to-prepare ferromagnets with high Curie temperature and further tune the magnetic properties and build devices based on them. We have designed two two-dimensional magnetic semiconductors CrSCl and CrSeBr with theoretical Curie temperatures up to 500 K from transition metal compound layered materials through computational screening and isoelectronic element replacement, and assembled interlayer heterojunctions with magneto-optical tuning properties. By tuning the components and geometrical configurations, we obtained a series of two-dimensional ternary metal compounds (MGeTe, M=Cr, Mn, Fe) with rich electronic structure and magnetic properties, and successfully designed metallic ferromagnets with room temperature Curie temperature. Further, we use both the nearest neighbor effect of the semiconductor substrate and the self-intercalation of Cr/I atoms to modulate the magnetic coupling properties of CrI3 bilayer magnets. Finally, we provide an outlook on the future direction of the search for new low-dimensional magnets in the light of recent progress.

Prof. Jijun Zhao, Dean of the School of Physics, Dalian University of Technology, Director of the Key Laboratory of Three-Beam Materials Modification, Ministry of Education, member of the Discipline Review Group of the Academic Degrees Committee of the State Council, and editorial board member of four SCI international journals including Journal of Cluster Science. His main research areas are low-dimensional condensed matter physics and computational materials science. He has published more than 680 SCI papers with more than 26,000 citations and an H-factor of 78, and is listed in the top 18,500 of the lifetime impact list of top scientists worldwide. He has received one National Natural Science Award and seven provincial and ministerial science and technology awards, and has been selected as one of the Leading Talents of the Ten Thousand Talents Program and a Distinguished Professor of Changjiang Scholar.

All students and teachers are welcome to attend!