Unveiling the mechanisms of the spin Hall effect in Ta

Abstract

Spin-to-charge current interconversions are widely exploited for the generation and detection of pure spin currents and are key ingredients for future spintronic devices including spin-orbit torques and spin-orbit logic circuits. In case of the spin Hall effect, different mechanisms contribute to the phenomenon and determining the leading contribution is peremptory for achieving the largest conversion efficiencies. Here, we experimentally demonstrate the dominance of the intrinsic mechanism of the spin Hall effect in highly-resistive Ta. We obtain an intrinsic spin Hall conductivity for $\beta$-Ta of -820$\pm$120 ($\hslash$/e) ${\Omega }^{-1}c{m}^{-1}$ from spin absorption experiments in a large set of lateral spin valve devices. The predominance of the intrinsic mechanism in Ta allows us to linearly enhance the spin Hall angle by tuning the resistivity of Ta, reaching up to -35$\pm$3%, the largest reported value for a pure metal.

9 pages and 4 figures + Supplemental Material (2 pages, 3 figures)

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Cited by in corpus (33)

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• Large spin current generation by the spin Hall effect in mixed crystalline phase Ta thin films
• Spin-orbit magnetic state readout in scaled ferromagnetic/heavy metal nanostructures
• Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal Mn${}_3$Sn
• Gate tunability of highly efficient spin-to-charge conversion by spin Hall effect in graphene proximitized with WSe${}_2$
• Ultrafast THz probing of nonlocal orbital current in transverse multilayer metallic heterostructures
• Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
• Spin Hall Effect in Bilayer Graphene Combined with an Insulator up to Room Temperature
• Role of exchange splitting and ligand field splitting in tuning the magnetic anisotropy of an individual iridium atom on TaS2 substrate
• Disentangling spin, anomalous and planar Hall effects in ferromagnetic/heavy metal nanostructures
• Low-symmetry topological materials for large charge-to-spin interconversion: The case of transition metal dichalcogenide monolayers
• Spin pumping and spin torque in interfacial tailored Co2FeAl/\b{eta}-Ta layers
• Spin-Hall magnetoresistance in a low-dimensional magnetic insulator
• Disentanglement of intrinsic and extrinsic side-jump scattering induced spin Hall effect in N-implanted Pt
• Current-Induced magnetization switching by the high spin Hall conductivity $\alpha$-W
• Quantifying the spin mixing conductance of EuO/W heterostructures by spin Hall magnetoresistance experiments
• Current direction anisotropy of the spin Hall magnetoresistance in nickel ferrite thin films with bulk-like magnetic properties
• Spin and orbital Hall currents detected via current induced magneto-optical Kerr effect in V and Pt
• Dimensional crossover in spin Hall oscillators
• Unified Framework for Charge-Spin Interconversion in Spin-Orbit Materials
• Large field-like torque in amorphous Ru2Sn3 originated from the intrinsic spin Hall effect
• Parity-controlled spin-wave excitations in synthetic antiferromagnets
• Easy-plane spin Hall oscillator
• Emergence of large spin-charge interconversion at an oxidized Cu/W interface
• Room temperature spin-orbit torque efficiency in sputtered low-temperature superconductor delta-TaN
• Voltage-Controlled Topological-Spin Switch for Ultra-Low-Energy Computing--Performance Modeling and Benchmarking
• Quantification of spin-charge interconversion in highly resistive sputtered Bi${}_x$Se${}_{1-x}$ with non-local spin valves
• Current-induced spin polarization at metallic surfaces from first-principles
• Dependence of the Inverse Spin Hall Effect in Sr(Nb${}_x$Ti${}_{1-x}$)O${}_3$ on the Nb concentration
• Large spin-charge interconversion induced by interfacial spin-orbit coupling in a highly conducting all-metallic system
• Gate-tunable charge-spin interconversion in graphene/heavy-metal heterostructures