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arXiv · 2210.03863

Comprehensive Demonstration of Spin-Hall Hanle Effects in Epitaxial Pt Thin Films

Jing Li·Andrew H. Comstock·Dali Sun·Xiaoshan Xu
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Abstract

We demonstrate a nonlinear Hall effect due to the boundary spin accumulation in Pt films grown on Al2O3 substrates. This Hall effect and the previously demonstrated Hanle magnetoresistance provide a complete picture of the spin-precession control of the spin and charge transport at the boundary of a spin-orbit coupled material, which we refer to as spin-Hall Hanle effects (SHHE). We also show that the SHHE can be employed to measure the spin diffusion length, the spin-Hall angle, and the spin relaxation time of heavy metal without the need of magnetic interface or the input from other measurements. The comprehensive demonstration of SHHE in such a simple system suggests they may be ubiquitous and needs to be considered for unravelling the spin and charge transport in more complex thin film structures of spin-orbit coupled materials.

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Jing Li, Andrew H. Comstock, Dali Sun, Xiaoshan Xu. 2022-10-08. Comprehensive Demonstration of Spin-Hall Hanle Effects in Epitaxial Pt Thin Films. https://doi.org/10.1103/physrevb.106.184420

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