Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 43: Spintronics (joint session HL/TT)

HL 43.6: Talk

Thursday, March 15, 2018, 16:30–16:45, EW 201

Calculation of Spin Diffusion Equations in Spin/Orbital Polarized Systems — •Vincent Sacksteder¹ and Yasufumi Araki² — ¹Royal Holloway University of London, UK — ²Tohoku University, Japan

This talk is about how to derive coarse-grained spin diffusion equations suitable for modeling a spintronics device from realistic Hamiltonians describing spin and scattering at the atomic scale. The standard formalism for obtaining diffusion equations requires performing an average over the Fermi surface, weighted by the scattering time. In spin or orbital-polarized systems the scattering time depends on spin and/or the orbital index; we describe the consequences for spin diffusion. This is important for modeling new memory devices which combine spin-orbit interactions with magnetization.