6533b7d7fe1ef96bd12685fe
RESEARCH PRODUCT
Evidence for phonon skew scattering in the spin Hall effect of platinum
A. WellsCosimo GoriniMathias KläuiD.-s. HanD.-s. HanUlrich EckernKowsar ShahbaziJune-seo KimR. Lo ConteHenk J. M. SwagtenRoberto RaimondiKyujoon LeeT. A. MooreT. SchulzGurucharan V. Karnadsubject
PhysicsCondensed matter physics530 PhysicsPhononScatteringddc:530chemistry.chemical_element02 engineering and technology530 PhysikCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnology01 natural sciencesMeasure (mathematics)chemistryImpurityElectrical resistivity and conductivity0103 physical sciencesSpin Hall effectddc:530Condensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologyPlatinumSpin-½description
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 $\mathrm{Pt}|\mathrm{Co}|{\mathrm{AlO}}_{x}$. 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 nonmonotonic 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 temperatures.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-03-26 | Physical Review B |