2018/10/31 by K. D. Belashchenko, Alexey A. Kovalev, Mark van Schilfgaarde +1 · 55 citations
Chemistry · Physics and Astronomy · #Bilayer #Chemistry #Condensed matter physics #Coupling (piping) #Formalism (music) #Magnetic properties of thin films #Materials science #Membrane #Physics #Physics of Superconductivity and Magnetism #Planar #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Supercell #Thermodynamics #Torque #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevmaterials.3.011401
published in Physical Review Materials 3(1) (American Physical Society) · 11 pages, 5 figures
openalex publication_date 2019/01/29 · arxiv created 2019/02/05 · arxiv updated 2019/02/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The angular dependence of spin-orbit torque in a disordered Co/Pt bilayer is calculated using a first-principles nonequilibrium Green's function formalism with an explicit supercell averaging over Anderson disorder. In addition to the usual dampinglike and fieldlike terms, the odd torque contains a sizable planar Hall-like term (m\ifmmode⋅\else\textperiodcentered\fiE)m\ifmmode×\else\texttimes\fi(z\ifmmode×\else\texttimes\fim) whose contribution to current-induced damping is consistent with experimental observations. The dampinglike and planar Hall-like torquances depend weakly on disorder strength, while the fieldlike torquance declines with increasing disorder. The torques that contribute to damping are almost entirely due to spin-orbit coupling on the Pt atoms, but the fieldlike torque does not require it.