Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session D29: Novel Spin and Charge Excitations and their Manipulations in Antiferromagnetic Weyl Semimetals
3:00 PM–6:00 PM,
Monday, March 14, 2022
Room: McCormick Place W-190B
Sponsoring Units: GMAG DCMP
Chair: Kai Liu, Georgetown University
Abstract: D29.00005 : Giant field-like torque by the out-of-plane magnetic spin Hall effect in a topological antiferromagnet Mn3Sn*
5:24 PM–6:00 PM
Recently we focus on magnetic spin Hall effect (MSHE) in the topological Wely antiferromagnet Mn3Sn, in which the spin-polarization direction of current-induced spin accumulation changes its sign upon flipping the chiral antiferromagnetic order, i.e., the cluster magnetic octupole. Notably, the magnetic order can be controlled by a small external magnetic field or a spin-orbit torque. Here, we will introduce our recent experimental results on the observation of a giant field-like torque via out-of-plane MSHE in the topological antiferromagnet Mn3Sn, whose direction and size can be tuned by changing the direction of order parameter. Our findings provide a new route for efficient manipulation of magnetic states and realization of novel functionalities by utilizing topological Weyl antiferromagnets. This is the work in collaboration with H. Chen, T. Tomita, M. Ikhlas, T. Higo, A. MacDonald, S. Nakatsuji and Y. Otani.
*This work was partially supported by JST-CREST(No. JPMJCR18T3) and JST-Mirai(JPMJMI20A1) and the Institute for Quantum Matter, an Energy Frontier Research Center funded by DOE, Office of Science, Basic Energy Sciences under Award # DE-SC0019331.
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