Dresden 2017 – scientific programme
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DS: Fachverband Dünne Schichten
DS 45: Transport: Spintronics, Spincalorics and Magnetotransport (jointly with HL, MA)
DS 45.5: Talk
Friday, March 24, 2017, 10:30–10:45, HSZ 03
Spin-charge coupled dynamics driven by a time-dependent magnetization — •Sebastian Tölle1, Ulrich Eckern1, and Cosimo Gorini2 — 1Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — 2Faculty of Physics, University of Regensburg, 93040 Regensburg, Germany
The spin-charge coupled dynamics in a thin, magnetized metallic system are investigated. The effective driving force acting on the charge carriers is generated by a dynamical magnetic texture, which can be induced, e.g., by a magnetic material in contact with a normal-metal system. We consider a general inversion-asymmetric substrate/normal-metal/magnet structure, which, by specifying the precise nature of each layer, can mimick various experimentally employed setups. Inversion symmetry breaking gives rise to an effective Rashba spin-orbit interaction. We derive general spin-charge kinetic equations which show that such spin-orbit interaction, together with anisotropic Elliott-Yafet spin relaxation, yields significant corrections to the magnetization-induced dynamics. To highlight their physical meaning, the spin pumping configuration of typical experimental setups is analyzed in detail. In the two-dimensional limit the build-up of a DC voltage is dominated by the spin galvanic (inverse Edelstein) effect. A measuring scheme that could isolate this contribution is discussed.