The scope of this work will be the study of spin transport through nanostructures, which exhibit strong charge interaction. Therefore, we theoretically discuss the simplest non-trivial model system which is a single-level quantum dot weakly tunnel
coupled to two ferromagnetic leads. We call this structure a quantum-dot spin valve.
A quantum-dot spin valve shows charge-related physical phenomena, like Coulomb blockade, which are known for non-magnetically contacted quantum dots. Furthermore it also shows spin-related effects like spin accumulation and tunnel magnetoresistance, just
like non-interacting magnetic structures would do. In addition to these already known effects, the strong charge interaction leads to a new phenomena, to an intrinsic coupling of the dot spin to the lead magnetizations, which can be an intrinsic source of
spin precession on the quantum dot.