1. Role of phonon skew scattering in the spin Hall effect of platinum
- Author
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Karnad, G. V., Gorini, C., Lee, K., Schulz, T., Conte, R. Lo, Wells, A. W. J., Han, D. -S., Shahbazi, K., Kim, J. -S., Moore, T. A., Swagten, H. J. M., Eckern, U., Raimondi, R., and Kl��ui, M.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,FOS: Physical sciences ,Condensed Matter::Strongly Correlated Electrons ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect - Abstract
We measure and analyze the effective spin Hall angle of platinum in the low residual resistivity regime by second harmonic measurements of the spin-orbit torques for a multilayer of Pt/Co/AlO$_x$. An angular dependent study of the torques allows us to extract the effective spin Hall angle responsible for the damping-like torque in the system. We observe a strikingly non-monotonic and reproducible temperature dependence of the torques. This behavior is compatible with recent theoretical predictions which include both intrinsic and extrinsic (impurities and phonons) contributions to the spin Hall effect at finite temperature.
- Published
- 2018