2017/03/31 by Yaroslav Tserkovnyak, Héctor Ochoa, Hector Ochoa · 33 citations
Mathematics · Physics and Astronomy · #Boundary (topology) #Condensed matter physics #Electron #Ferromagnetism #Isotropy #Magnetic properties of thin films #Mathematical analysis #Mathematics #Non-equilibrium thermodynamics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spin engineering #Spin polarization #Symmetry (geometry) #Symmetry breaking #Theoretical and Computational Physics #Transfer matrix #Work (physics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.96.100402
published in Physical review. B./Physical review. B 96(10) (American Physical Society) · 6 pages, 2 figures
arxiv created 2017/08/11 · openalex publication_date 2017/09/05 · arxiv updated 2017/09/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We develop a comprehensive description of static and dynamic spin-transfer torque at interfaces between a normal metal and a magnetic material. Specific examples of the latter include ferromagnets, collinear and noncollinear antiferromagnets, general ferrimagnets, and spin glasses. We study the limit of the exchange-dominated interactions, so that the full system is isotropic in spin space, apart from a possible symmetry-breaking order. A general such interface yields three coefficients (corresponding to three independent generators of rotations) generalizing the well-established notion of the spin-mixing conductance, which pertains to the collinear case. We develop a nonequilibrium thermodynamic description of the emerging interfacial spin transfer and its effect on the collective spin dynamics, while circumventing the usual discussion of spin currents and net spin dynamics. Instead, our focus is on the dissipation and work effectuated by the interface. Microscopic scattering-matrix based expressions are derived for the generalized spin-transfer coefficients.