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HL: Fachverband Halbleiterphysik

HL 81: Transport: Spintronics, Spincalorics and Magnetotransport (jointly with DS, HL, MA)

HL 81.3: Vortrag

Freitag, 24. März 2017, 10:00–10:15, HSZ 03

Spin-switching via quantum dot spin valves — •Niklas M. Gergs¹, Scott A. Bender¹, Rembert A. Duine^1,2, and Dirk Schuricht¹ — ¹Institute for Theoretical Physics, Utrecht University, Utrecht, The Netherlands — ²Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands

We theoretically investigate a spin-valve transistor setup, ie, correlated transport through a quantum dot positioned between two spin-polarised nano magnets. This causes the dynamical generation of a magnetic field on the dot even in the absence of external fields [1].

Here we consider the back action of the quantum dot onto the attached nano magnets via exerted spin torques. This may be used to switch the nano magnets reliably from a parallel to an anti-parallel alignment and vice versa. All operations are done in the Coulomb-blockade regime of the quantum dot, so that the charge transport through the setup is strongly suppressed.

[1] M. Braun, J. König, J. Martinek, Phys. Rev. B 70, 195345 (2004)