Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime

By E. Sagasta, Y. Omori, M. Isasa, M. Gradhand, L. Hueso, Y. Niimi, Yoshichika Otani, F. Casanova. 2016

236 citations recorded by the source corpus.

We systematically measure and analyze the spin diffusion length and the spin Hall effect in Pt with a wide range of conductivities using the spin absorption method in lateral spin valve devices. We observe a linear relation between the spin diffusion length and the conductivity, evidencing that the spin relaxation in Pt is governed by the Elliott-Yafet mechanism. We find a single intrinsic spin Hall conductivity ($\sigma_{SH}^{int}=1600\pm150\: \Omega^{-1}cm^{-1}$) for Pt in the full range studied which is in good agreement with theory. For the first time we have obtained the crossover between the moderately dirty and the superclean scaling regimes of the spin Hall effect by tuning the conductivity. This is equivalent to that obtained for the anomalous Hall effect. Our results explain the spread of the spin Hall angle values in the literature and find a route to maximize this important parameter.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/9c0568a10fd21311ce0b2366da1bbe8f498daa13

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Highly Efficient Spin-Current Generation by the Spin Hall Effect in Au1−xPtx (2018, background): “the prospective implementation of SOT devices in cryogenic computing systems [11].”
Giant orbital Hall effect and orbital-to-spin conversion in 3d, 5d, and 4f metallic heterostructures (2022, background): “The analogy with the SHE [41,42] suggests that also extrinsic processes may contribute to the generation of orbital currents.”