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MA: Fachverband Magnetismus

MA 26: Spin dynamics and transport

MA 26.1: Talk

Wednesday, April 3, 2019, 09:30–09:45, H37

Electric-field control of interfacial spin-orbit fields — •Lin Chen¹, Martin Gmitra², Michael Vogel¹, Robert Islinger¹, Matthias Kronseder¹, Dieter Schuh¹, Dominique Bougeard¹, Jaroslav Fabian², Dieter Weiss¹, and Christian Back³ — ¹Institute of Experimental and Applied Physics, University of Regensburg, Germany — ²Institute of Theoretical Physics, University of Regensburg, Germany — ³Department of Physics, Technical University Munich, Germany

Electric-field control of current-induced spin-orbit magnetic fields provides a route towards the low-power spin-orbit torque devices. Here, we show that the current-induced spin-orbit magnetic fields at the Fe/GaAs (001) interface [1] can be controlled with an electric field. In particular, by applying a gate-voltage across the Fe/GaAs interface, the interfacial spin-orbit field-vector acting on Fe can be robustly modulated via the change of the magnitude of the interfacial spin-orbit interaction [2]. Our results illustrate that the electric-field in a Schottky barrier is capable of modifying spin-orbit magnetic fields, an effect that could be used to develop spin-orbit torque devices with low-power consumption. [1] L. Chen et al., Nature Commu. 7, 13802 (2016). [2] L. Chen et al., Nature Elect. 1, 350-355 (2018).