ASCENT Theme 2 Liaison Meeting / A Room Temperature Polar Magnetic Metal

Neel Type Skyrmion Lattice

A Room Temperature Polar Magnetic Metal

Time: 4:00pm eastern time

Abstract: The emergence of long-range magnetic order in non-centrosymmetric compounds has stimulated interest in the possibility of exotic spin transport phenomena and topologically protected spin textures for applications in next generation spintronics. Polar magnets, with broken symmetries of spatial inversion and time reversal, usually host chiral spin textures. This work reports a novel wurtzite-structure polar magnetic metal, identified as AA’-stacked (Fe0.5Co0.5)5GeTe2, which exhibits a Néel-type skyrmion lattice as well as a Rashba-Edelstein effect at and above room temperature. Atomic resolution imaging of the structure reveals a structural transition as a function of Co-substitution, leading to the emergence of the polar phase at 50% Co. This discovery reveals an unprecedented layered polar magnetic system for investigating intriguing spin topologies and ushers in a promising new framework for spintronics.

Presenters: Hongrui Zhang and Ramamoorthy Ramesh, University of California, Berkeley

This meeting is only available to the JUMP research community, such as Principal Investigators, Postdoc researchers, Students, and Industry/Government liaisons.