Large out-of-plane spin-orbit torque in topological Weyl semimetal TaIrTe4
Artikel i vetenskaplig tidskrift, 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.
Författare
Lakhan Bainsla
Indian Institute of Technology
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Bing Zhao
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Nilamani Behera
Göteborgs universitet
Anamul Md Hoque
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Lars Sjöström
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Anna Martinelli
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Mahmoud Abdel-Hafiez
Uppsala universitet
University of Sharjah
Johan Åkerman
Göteborgs universitet
Tohoku University
Saroj Prasad Dash
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 15 1 4649-Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1038/s41467-024-48872-3
PubMed
38821948