Observation of Thickness-Modulated Out-of-Plane Spin–Orbit Torque in Polycrystalline Few-Layer Td-WTe2 Film DOI Creative Commons

Mingkun Zheng,

Wancheng Zhang, You Lv

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(10), P. 762 - 762

Published: May 19, 2025

The low-symmetry Weyl semimetallic Td-phase WTe2 exhibits both a distinct out-of-plane damping torque (τDL) and exceptional charge–spin interconversion efficiency enabled by strong spin-orbit coupling, positioning it as prime candidate for spin–orbit (SOT) applications in two-dimensional transition metal dichalcogenides. Herein, we report on thickness-dependent unconventional τDL chemically vapor-deposited (CVD) polycrystalline Td-WTe2 (t)/Ni80Fe20/MgO/Ti (Td-WTN-t) heterostructures. Angle-resolved spin-torque ferromagnetic resonance measurements the Td-WTN-12 structure showed significant spin Hall conductivities of σSH,y = 4.93 × 103 (ℏ/2e) Ω−1m−1 σSH,z 0.81 Ω−1m−1, highlighting its potential wafer-scale device applications. Additionally, detailed examination magnetotransport properties few-layer films function thickness revealed marked amplification magnetoresistance, which can be ascribed to anisotropic nature charge carrier scattering mechanisms within material. Spin pumping Td-WTN-t heterostructures further transport Td-WTe2, with analysis yielding an diffusion length λSD ≈ 14 nm.

Language: Английский

Observation of Thickness-Modulated Out-of-Plane Spin–Orbit Torque in Polycrystalline Few-Layer Td-WTe2 Film DOI Creative Commons

Mingkun Zheng,

Wancheng Zhang, You Lv

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(10), P. 762 - 762

Published: May 19, 2025

The low-symmetry Weyl semimetallic Td-phase WTe2 exhibits both a distinct out-of-plane damping torque (τDL) and exceptional charge–spin interconversion efficiency enabled by strong spin-orbit coupling, positioning it as prime candidate for spin–orbit (SOT) applications in two-dimensional transition metal dichalcogenides. Herein, we report on thickness-dependent unconventional τDL chemically vapor-deposited (CVD) polycrystalline Td-WTe2 (t)/Ni80Fe20/MgO/Ti (Td-WTN-t) heterostructures. Angle-resolved spin-torque ferromagnetic resonance measurements the Td-WTN-12 structure showed significant spin Hall conductivities of σSH,y = 4.93 × 103 (ℏ/2e) Ω−1m−1 σSH,z 0.81 Ω−1m−1, highlighting its potential wafer-scale device applications. Additionally, detailed examination magnetotransport properties few-layer films function thickness revealed marked amplification magnetoresistance, which can be ascribed to anisotropic nature charge carrier scattering mechanisms within material. Spin pumping Td-WTN-t heterostructures further transport Td-WTe2, with analysis yielding an diffusion length λSD ≈ 14 nm.

Language: Английский

Citations

0