Large out-of-plane spin-orbit torque in topological Weyl semimetal TaIrTe4
Journal article, 2024
The unique electronic properties of topological quantum materials, such as protected surface states and exotic quasiparticles, can provide an out-of-plane spin-polarized current needed for external field-free magnetization switching of magnets with perpendicular magnetic anisotropy. Conventional spin-orbit torque (SOT) materials provide only an in-plane spin-polarized current, and recently explored materials with lower crystal symmetries provide very low out-of-plane spin-polarized current components, which are not suitable for energy-efficient SOT applications. Here, we demonstrate a large out-of-plane damping-like SOT at room temperature using the topological Weyl semimetal candidate TaIrTe4 with a lower crystal symmetry. We performed spin-torque ferromagnetic resonance (STFMR) and second harmonic Hall measurements on devices based on TaIrTe4/Ni80Fe20 heterostructures and observed a large out-of-plane damping-like SOT efficiency. The out-of-plane spin Hall conductivity is estimated to be (4.05 ± 0.23)×104 (ℏ ⁄ 2e) (Ωm)-1, which is an order of magnitude higher than the reported values in other materials.
Author
Lakhan Bainsla
Indian Institute of Technology
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Bing Zhao
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Nilamani Behera
University of Gothenburg
Anamul Md Hoque
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Lars Sjöström
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Anna Martinelli
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Mahmoud Abdel-Hafiez
Uppsala University
University of Sharjah
Johan Åkerman
University of Gothenburg
Tohoku University
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 15 1 4649-Subject Categories
Condensed Matter Physics
DOI
10.1038/s41467-024-48872-3
PubMed
38821948