Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F54: Terahertz Spintronics and Spin-Torque Driven Magnetization Dynamics
8:00 AM–10:24 AM,
Tuesday, March 15, 2022
Room: McCormick Place W-476
Sponsoring
Units:
GMAG DMP
Chair: Jonathan Daniel Gibbons, UIUC
Abstract: F54.00007 : Spin-Orbit Torques in Mn3Sn and FeSn Topological Semimetals
10:00 AM–10:12 AM
Presenter:
Sabit Karayev
(University of Miami)
Authors:
Sabit Karayev
(University of Miami)
Tilak R Thapaliya
(University of Miami)
Durga Khadka
(Univ of Miami)
Sunxiang Huang
(Univ of Miami)
John Q Xiao
(University of Delaware)
A new class of topological materials called topological semimetals (TSMs), have not only topological bulk states but also surface Fermi arc states with unusual spin-momentum locking. Both bulk and surface states can generate large SOT whose characteristics are altogether different from that in common heavy metals and possibly TIs (3). Our work on Mn3Sn and FeSn Topological semimetals have shown additional contributions to the signal coming from SOTs in harmonic hall measurements. The results suggest that these signals may be generated from unusual spin polarizations.
- 1. Mellnik, A. R. et al. “Spin-transfer torque generated by a topological insulator”. Nature 511, 449–451 (2014).
2. Garello, K. et al. “Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures.” Nat. Nanotech. 8, 587–593 (2013).
3. S. Shi et.al, “All-electric magnetization switching and Dzyaloshinskii–Moriya interaction in WTe2/ferromagnet heterostructures”, Nat. Nanotechnol. 2019, 14, 945.
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