Spin switching via quantum dot spin valves

Abstract

We develop a theory for spin transport and magnetization dynamics in a quantum-dot spin valve, i.e., two magnetic reservoirs coupled to a quantum dot. Our theory is able to take into account effects of strong correlations. We demonstrate that, as a result of these strong correlations, the dot gate voltage enables control over the current-induced torques on the magnets, and, in particular, enables voltage-controlled magnetic switching. The electrical resistance of the structure can be used to read out the magnetic state. Our model may be realized by a number of experimental systems, including magnetic scanning-tunneling microscope tips and artificial quantum dot systems.

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Cited by in corpus (9)

• A quantum-dot heat engine operating close to the thermodynamic efficiency limits
• Thermoelectric characterization of the Kondo resonance in nanowire quantum dots
• Optimal power and efficiency of single quantum dot heat engines: theory and experiment
• Large voltage-tunable spin valve based on a double quantum dot
• Pseudospin resonances reveal synthetic spin-orbit interaction
• Charge and heat transport through quantum dots with local and correlated-hopping interactions
• Multilevel coherences in quantum dots
• Interaction-induced current asymmetries in resonant transport through interacting quantum-dot spin valves revealed by iterative summation of path integrals
• Breaking of Coulomb blockade by macrospin-assisted tunneling